Board-certified podiatric surgeon & foot specialist | Balance Foot & Ankle
Last reviewed: May 2026
The back of your heel feels swollen and burns when your shoe presses against it. Or there’s a deep, aching pain under the ball of your foot that feels like you’re stepping on a marble. Or maybe the area around your big toe joint is puffy and tender, even at rest. You’ve tried resting. You’ve iced it. Nothing helps.
Foot bursitis — inflammation of the bursal sacs that cushion bony prominences and tendons — is one of the most underdiagnosed causes of foot pain we encounter in our podiatry practice. Patients often arrive after being told they have plantar fasciitis or a neuroma, when the actual culprit is an irritated or infected bursa sitting nearby. Getting the diagnosis right changes the entire treatment approach.
This guide covers every major type of foot bursitis, how to recognize each one, and the most effective treatments based on both the current evidence and what we actually see working in clinical practice.
What Is Foot Bursitis?
A bursa (plural: bursae) is a small, closed, fluid-filled sac lined with synovial membrane — the same tissue that lines your joints. Bursae act as biological ball bearings, reducing friction and absorbing pressure where tendons, bones, and skin rub against each other.
The foot contains several anatomic (pre-existing) bursae: the retrocalcaneal bursa behind the heel, the subcalcaneal bursa under the heel bone, bursae around the sesamoid bones under the big toe, and small intermetatarsal bursae between the metatarsal heads. The foot can also develop adventitial bursae — new bursae that form as a response to chronic pressure or friction, often over bunions or hammer toes.
Bursitis occurs when any of these bursae become inflamed — most commonly from repetitive mechanical stress, but also from direct trauma, infection, gout, or systemic inflammatory diseases like rheumatoid arthritis. When inflamed, the bursa walls thicken and fluid production increases dramatically, causing the visible swelling and tenderness characteristic of bursitis.
In our clinic, we see foot bursitis underdiagnosed because it often co-exists with other conditions. Retrocalcaneal bursitis frequently accompanies insertional Achilles tendinopathy. Intermetatarsal bursitis lives next door to Morton’s neuroma. Subcalcaneal bursitis mimics plantar fasciitis almost exactly. Sorting these out requires careful examination and often ultrasound imaging.
The 5 Most Common Locations of Foot Bursitis
1. Retrocalcaneal Bursitis (Back of the Heel)
The retrocalcaneal bursa sits between the back of the heel bone (calcaneus) and the Achilles tendon. When the heel counter of a shoe repeatedly compresses this area — or when Haglund’s deformity (a bony prominence on the back of the heel) creates chronic friction — this bursa becomes inflamed.
Classic presentation: pain specifically at the back of the heel, worse when you compress the soft tissue on either side of the Achilles tendon just above where it attaches (the “two-finger squeeze test”). Morning stiffness and pain when walking down stairs (which loads the Achilles eccentrically) are common. The back of the heel may look visibly swollen and feel warm.
This is distinct from non-insertional Achilles tendinopathy, which causes pain 2–6 cm above the insertion. Retrocalcaneal bursitis pain is at the insertion level, and the two conditions commonly co-exist.
2. Subcalcaneal Bursitis (Under the Heel)
Less commonly discussed but frequently encountered. A subcalcaneal bursa sits directly under the heel bone. When subjected to chronic impact — runners, those who work on hard floors, people who are overweight — this bursa can become inflamed.
The mimicry with plantar fasciitis is significant: both cause heel pain that’s worst with the first steps in the morning. The key difference is location. Plantar fasciitis pain is at the medial heel (just in front of and slightly inside the heel center). Subcalcaneal bursitis pain is directly under the heel — pressing straight up into the center of the heel bone reproduces the pain. Ultrasound reliably distinguishes the two.
3. Intermetatarsal Bursitis (Ball of the Foot)
Between each pair of metatarsal heads lies a small bursa. These are most commonly involved between the 2nd–3rd and 3rd–4th metatarsal spaces. High heels, narrow shoes, and activities that load the forefoot repeatedly — running, dancing — inflame these bursae.
The symptom overlap with Morton’s neuroma is the source of many misdiagnoses. Both cause pain in the ball of the foot, aggravated by walking and tight footwear. The distinction: Morton’s neuroma tends to cause more shooting, burning, or electric pain and is reproduced by Mulder’s click test (squeezing the metatarsal heads together). Intermetatarsal bursitis produces more of a dull ache directly between the metatarsal heads, and ultrasound will show a hypoechoic fluid collection (the inflamed bursa) rather than the hypoechoic mass of a neuroma.
4. Bunion Bursitis (Big Toe Joint)
The medial eminence — the bony bump of a bunion — can develop an adventitial (acquired) bursa from shoe pressure. This bursa, when inflamed, causes the skin over the bunion to appear red, warm, and shiny. The swelling is separate from the underlying joint arthritis of the bunion itself.
Patients often describe their bunion as “suddenly getting much worse” — what’s actually happened is that the overlying bursa has become acutely inflamed, dramatically amplifying local tenderness. Treating the bursitis (shoe modification, aspiration if needed) often returns the patient to their baseline comfortable level quickly, even without addressing the underlying bunion.
5. Sesamoid Bursitis (Under the Big Toe Joint)
The two sesamoid bones embedded in the flexor hallucis brevis tendon under the first metatarsal head each have a small bursa. In dancers, runners, and those with high arches (which load the forefoot heavily), sesamoid bursitis can develop — mimicking sesamoiditis (inflammation of the sesamoid bone itself).
Sesamoid bursitis presents as pain directly under the big toe joint that worsens with push-off and toe dorsiflexion (bending the big toe back). Unlike sesamoiditis, it doesn’t show changes on bone scan or MRI bone marrow edema — it’s a soft tissue finding best seen on ultrasound.
Symptoms of Foot Bursitis
Despite the variety of locations, foot bursitis tends to produce a recognizable symptom cluster that helps distinguish it from other foot conditions:
Localized swelling. Bursitis swelling is usually confined to the area of the inflamed bursa — a discrete, palpable puffiness rather than diffuse foot swelling. It can look like a small fluid-filled blister under the skin.
Warmth and redness. The overlying skin often feels warm and may appear red or pink. This is more pronounced in acute bursitis or infected bursitis. Chronic bursitis may have less visible redness.
Pain with specific movements or pressure. The pain of bursitis is characteristically provoked by direct pressure on the bursa or by the movement that compresses it. Retrocalcaneal bursitis hurts when you press behind the heel. Intermetatarsal bursitis hurts with direct pressure between the metatarsal heads. This specificity helps clinicians localize the inflamed bursa.
Pain worse with activity, better with rest. Unlike nerve pain that can occur at rest, mechanical bursitis is typically activity-dependent — the more you do, the worse it gets.
Morning stiffness. After being off your feet overnight, the inflamed bursa can swell further and feel particularly stiff and painful with the first steps. This often improves after a few minutes of walking as the fluid redistributes.
Footwear sensitivity. Because many bursae are in locations that directly contact shoe material (heel counter for retrocalcaneal, shoe upper for bunion, shoe forefoot for intermetatarsal), shoe choice dramatically affects symptoms. Patients often describe one pair of shoes that’s “fine” and another that’s “unbearable” for the same activity level.
Causes & Risk Factors
Mechanical overuse. The most common cause — repetitive pressure or friction inflames the bursa over time. Runners increasing mileage too quickly, people who stand on hard surfaces all day, dancers, and anyone transitioning to shoes with significantly different heel height are at risk.
Direct trauma. A single impact to the heel, ball of the foot, or big toe can acutely inflame a bursa. This is common after sports injuries, falls, or stepping on a hard object.
Ill-fitting footwear. High heels overload the forefoot bursae. Stiff heel counters compress the retrocalcaneal bursa. Narrow toe boxes squeeze the intermetatarsal bursae and create friction over bunions. Footwear is the number one modifiable risk factor.
Foot structure. High arches (cavus feet) concentrate pressure on the heel and forefoot, loading the subcalcaneal and intermetatarsal bursae. Haglund’s deformity — a bony bump on the back of the heel, more common in people with high arches — directly impinges on the retrocalcaneal bursa. Bunions create a new bony prominence for an adventitial bursa to develop over.
Systemic inflammatory diseases. Rheumatoid arthritis, psoriatic arthritis, and ankylosing spondylitis all increase susceptibility to bursitis throughout the body, including the foot. Gout can cause acute bursal inflammation when urate crystals deposit in or near the bursa.
Infection (septic bursitis). Bacteria can enter a superficial bursa through a skin break, causing septic bursitis. This is a medical urgency — the infected fluid needs to be drained and antibiotics started promptly. Septic bursitis is more common in superficial bursae (like over a bunion) than in deep bursae (like retrocalcaneal).
Diagnosis
Diagnosing foot bursitis begins with a detailed clinical examination — the specific location of maximal tenderness, the character of the pain, and what movements reproduce it provide the diagnostic framework. Physical examination alone can suggest bursitis in most cases, but imaging confirms it and rules out other pathology.
Ultrasound is our first-line imaging choice. Real-time ultrasound can directly visualize bursal fluid, measure the size of the inflamed bursa, assess the adjacent tendon for co-existing tendinopathy, and guide aspiration or injection precisely. A normal retrocalcaneal bursa is nearly invisible on ultrasound — when inflamed, it appears as an obvious anechoic (dark) fluid collection.
MRI is used for complex or atypical cases. It provides excellent soft tissue contrast, can show marrow edema in an adjacent bone (suggesting associated osteomyelitis or stress fracture), and identifies the extent of tendon involvement when multiple structures are affected.
X-ray helps rule out bony causes — Haglund’s deformity, calcaneal stress fracture, sesamoid fracture, or arthritic change at the first MTP joint.
Lab work is ordered when systemic cause is suspected: uric acid (gout), ESR/CRP (inflammatory arthritis), or complete blood count with cultures if septic bursitis is possible.
Aspiration is both diagnostic and therapeutic. When a bursa is drained, the fluid’s appearance tells us a great deal: clear or straw-colored fluid = mechanical bursitis; milky fluid = calcium pyrophosphate or urate crystals; cloudy or purulent fluid = infection requiring culture and sensitivity testing; blood-tinged fluid = traumatic bursitis or hemarthrosis.
Treatment Options
Conservative First-Line Treatment (Weeks 1–4)
Activity modification. Reduce or temporarily stop the activity driving the bursitis — whether that’s running mileage, time on hard floors, or wearing offending footwear. You don’t need complete rest, but you do need to reduce the repetitive stress that’s maintaining the inflammatory cycle.
Ice therapy. 15–20 minutes of ice application (through a cloth barrier to protect skin) 2–3 times daily reduces acute inflammation. Ice is most effective in the first 1–2 weeks of an acute flare.
NSAIDs. Oral anti-inflammatories (ibuprofen, naproxen) taken at therapeutic anti-inflammatory doses (not just pain relief doses — 400–600 mg ibuprofen three times daily with food) for 7–14 days reduce bursal inflammation systemically. Topical diclofenac (Voltaren gel) applied directly over the bursitis site achieves local therapeutic concentrations with fewer GI side effects.
Footwear modification. Switch to footwear that doesn’t directly contact the inflamed bursa. For retrocalcaneal bursitis: open-back shoes, clogs, or Crocs immediately eliminate the provocative pressure. For intermetatarsal bursitis: wide toe-box shoes and lower heels reduce forefoot compression. For bunion bursitis: soft, stretchy uppers avoid friction on the medial eminence.
Padding and offloading. Donut-shaped moleskin pads around (not over) the inflamed bursa protect it from pressure without directly compressing it. Heel cups reduce impact for subcalcaneal and retrocalcaneal bursitis. Metatarsal pads placed just behind the metatarsal heads off-load intermetatarsal bursitis by reducing forefoot peak pressure.
Aspiration and Corticosteroid Injection (If Conservative Fails)
When bursitis persists beyond 4–6 weeks despite conservative treatment, office-based aspiration with or without corticosteroid injection is highly effective. We perform this under ultrasound guidance to ensure precise needle placement into the bursal sac.
The aspiration removes the excess fluid — immediately reducing pressure and pain. Adding a small dose of corticosteroid (methylprednisolone or triamcinolone) into the bursa after aspiration reduces the inflammatory response and helps prevent re-accumulation. Most patients experience significant relief within 48–72 hours of injection.
One caution with corticosteroid injections: repeated injections into the same bursa can weaken the adjacent tendon. For retrocalcaneal bursitis, the Achilles tendon proximity means we are careful about frequency — typically no more than 2 injections per year, and never directly into the tendon substance.
Surgery (Reserved for Refractory Cases)
The vast majority of foot bursitis cases resolve with conservative measures or injection. Surgery is considered when bursitis is recurrent, fails multiple rounds of conservative treatment, and significantly impacts quality of life. The surgical approach depends on location:
For retrocalcaneal bursitis associated with Haglund’s deformity: excision of the bursa combined with resection of the bony prominence. Simply removing the bursa without addressing the bone will result in rapid recurrence. This can be done open or arthroscopically.
For intermetatarsal bursitis: when it truly cannot be distinguished from Morton’s neuroma (and surgical treatment is appropriate), excision of the bursa or neuroma can be performed from a dorsal approach.
For septic bursitis: surgical irrigation and debridement (I&D) is sometimes required if antibiotics alone fail to resolve the infection, or if there is extensive involvement of surrounding tissue.
Products That Help Foot Bursitis
👟 HOKA Bondi 9 — Maximum Cushion Running Shoe
For almost any type of foot bursitis, switching to maximum-cushion footwear with a soft, accommodative upper is the single most impactful footwear change you can make. The HOKA Bondi 9’s thick EVA midsole reduces ground reaction forces at the heel and forefoot, its wide platform reduces lateral pressure, and its soft mesh upper avoids the rigid heel counters and narrow forefoot that aggravate retrocalcaneal and intermetatarsal bursitis respectively.
🦶 Tuli’s Heavy Duty Heel Cups
For retrocalcaneal and subcalcaneal bursitis, a proper heel cup does two things: it cushions the impact on the painful heel and slightly elevates it, which reduces tension on the Achilles tendon and decreases compression of the retrocalcaneal bursa. Tuli’s heavy-duty model is made for patients who are heavier, very active, or both — the standard versions flatten out too quickly for meaningful cushioning. These are one of the first things we recommend for heel bursitis before trying anything more invasive.
💊 Voltaren Arthritis Pain Gel (Topical Diclofenac 1%)
For superficially located bursitis (bunion bursitis, intermetatarsal bursitis, retrocalcaneal bursitis), topical diclofenac achieves local anti-inflammatory concentrations at the tissue level without the GI side effects of oral NSAIDs. Voltaren is FDA-approved for osteoarthritis pain but we use it regularly off-label for soft tissue bursitis — it works well. Apply 4 times daily directly over the inflamed area. Avoid open skin or wounds.
🩺 Powerstep Pinnacle Maxx Orthotic Insoles
Custom-grade support without the custom price. For foot bursitis driven by abnormal mechanics — high arches overloading heel and forefoot bursae, flat feet creating excessive pronation that stresses midfoot joints — a firm supportive insole corrects the load distribution. The Pinnacle Maxx provides the firmest shell of the Powerstep line and is our go-to recommendation for patients who need real mechanical control, not just a soft cushion that bottoms out in a week.
Warning Signs: When to See a Podiatrist
- Fever with foot swelling and redness — this combination strongly suggests septic (infected) bursitis, which is a medical urgency. Untreated septic bursitis can spread to the underlying bone (osteomyelitis) or cause septicemia. Seek evaluation same day or go to urgent care.
- Rapidly worsening redness and warmth spreading up the foot — this pattern (cellulitis) suggests spreading infection beyond the bursa. It requires immediate IV or high-dose oral antibiotics and close monitoring.
- Pain so severe you cannot bear weight — mechanical bursitis is painful but typically allows some weight-bearing. Inability to walk at all should prompt evaluation to rule out fracture, tendon rupture, or bone infection.
- No improvement after 6 weeks of conservative care — if rest, shoe modification, ice, and NSAIDs have not meaningfully improved your symptoms, it’s time for professional evaluation. You may need imaging to confirm the diagnosis or an injection to break the inflammatory cycle.
- Recurrent bursitis in the same location — recurrent episodes suggest an underlying structural problem (Haglund’s deformity, bunion deformity, untreated inflammatory arthritis) that needs to be addressed rather than just managing each episode as it occurs.
Frequently Asked Questions
How long does foot bursitis take to heal?
Most cases of acute mechanical foot bursitis improve significantly within 4–8 weeks with appropriate conservative treatment — footwear modification, activity reduction, NSAIDs, and padding. Chronic bursitis (present for months before treatment) takes longer — 8–16 weeks — because the bursal walls have thickened and the inflammatory process is more entrenched. Cases requiring corticosteroid injection typically show marked improvement within 2 weeks of the injection. Surgical cases have variable recovery depending on location and whether bone work was needed.
Is foot bursitis the same as plantar fasciitis?
No — though they can feel similar and co-exist in the same patient. Plantar fasciitis involves inflammation of the plantar fascia ligament at its attachment to the heel bone, producing pain at the medial heel with the first steps in the morning. Subcalcaneal bursitis involves inflammation of the bursa directly under the heel bone and produces pain more centrally under the heel with direct downward pressure. They require different treatments: plantar fasciitis responds to stretching and night splinting; subcalcaneal bursitis responds to cushioning and impact reduction. Ultrasound reliably distinguishes them.
Can I walk on a foot with bursitis?
Generally yes, as long as you’re wearing accommodative footwear and the pain is manageable. Walking on it continuously without modifying load is what perpetuates the bursitis — but complete immobilization is not necessary for most cases. The goal is modified activity rather than complete rest. If walking on it causes severe pain, or if you’re limping significantly, you should be evaluated sooner rather than later.
Can bursitis on the foot come back after treatment?
Yes — if the underlying cause isn’t addressed, recurrence is common. Aspiration alone has a 20–40% recurrence rate. Even after surgical excision, if the structural problem driving the bursitis (Haglund’s deformity, severe bunion deformity, continued high-impact activity in wrong footwear) persists, bursitis can return. Long-term management includes ongoing footwear optimization, activity modification, and treating any associated structural foot problems.
What’s the difference between a bursa and a cyst on the foot?
A bursa is a normal anatomical structure (or an acquired one) that becomes inflamed — it’s a sac-like space that can fill with fluid. A ganglion cyst is a fluid-filled lump that arises from a joint capsule or tendon sheath and forms a discrete, palpable mass. The key clinical distinction: bursitis tends to be more diffuse, with swelling confined to the known anatomical location of the bursa and often not forming a distinct palpable lump. A ganglion cyst forms a well-defined, smooth, discrete mass that you can press and feel separately from surrounding tissue. Both can cause pain and both can be aspirated, but they have different recurrence rates and management algorithms.
The Bottom Line
Foot bursitis is a common, treatable condition that is too often misdiagnosed as plantar fasciitis, Morton’s neuroma, or generalized “foot pain.” Getting the diagnosis right — through careful examination and targeted imaging — changes the management entirely and dramatically speeds recovery. The vast majority of cases respond well to conservative care within 4–8 weeks, and those that don’t typically resolve with a precisely placed corticosteroid injection.
The most important thing you can do right now: address your footwear. Whether it’s the stiff heel counter provoking retrocalcaneal bursitis, the narrow toe box compressing the intermetatarsal bursae, or the bunion rubbing against the shoe, footwear is both the most common cause and the most accessible thing to change. If you’ve already done that and are still struggling, it’s time for a professional evaluation.
Sources
- Canoso JJ. Bursitis, tenosynovitis, ganglions, and painful lessons. Curr Opin Rheumatol. 1990;2(2):221–226.
- Sofka CM, Adler RS, Positano R, et al. Haglund’s syndrome: diagnosis and treatment using sonography. HSS J. 2006;2(1):27–29.
- Gibbon WW, Long G. Ultrasound of the plantar aponeurosis (fascia). Skeletal Radiol. 1999;28(1):21–26.
- Gregg JM, Silberstein M, Schneider T, et al. Sonographic and MRI evaluation of the plantar plate: a prospective study. Eur Radiol. 2006;16(12):2661–2669.
- Khoury NJ, el-Khoury GY, Saltzman CL, Brandser EA. MR imaging of posterior tibial tendon dysfunction. AJR Am J Roentgenol. 1996;167(3):675–682.
- Llopis E, Carrascoso J, Iriarte I, et al. Lisfranc injury: spectrum of imaging findings and differential diagnosis. Radiographics. 2015;35(3):842–858.
Foot Bursitis That Won’t Quit? We Can Help.
Precise ultrasound-guided aspiration and injection available. Same-week appointments often available.
Howell: (810) 206-1402
Bloomfield Township: (810) 206-1402
4.9★ | 1,123+ Reviews | 3,000+ Surgeries | Balance Foot & Ankle
📋 Dr. Tom Biernacki, DPM, FACFAS answers:
Foot bursitis is inflammation of a bursa — a small, fluid-filled sac that cushions bones, tendons, and skin from friction. In the foot, the most common locations are the back of the heel (retrocalcaneal bursitis), the ball of the foot (intermetatarsal bursitis), and the big toe joint. Most patients describe it as a burning, aching pressure that worsens with shoe contact or prolonged standing. I diagnose bursitis with ultrasound, which shows bursal fluid accumulation in real time. For mild to moderate cases, I start with wider footwear, donut-shaped padding to offload the bursa, custom orthotics, and a short course of NSAIDs. If symptoms persist beyond 6 to 8 weeks, a precisely placed cortisone injection into the bursa — guided by ultrasound — usually resolves it quickly. The key is also correcting the underlying cause, whether that is a Haglund deformity, overpronation, or footwear mechanics, so the bursitis does not return.
What is foot bursitis and where does it occur?
Foot bursitis is inflammation of a bursa — a fluid-filled sac that cushions bones, tendons, and skin from friction. Common locations: retrocalcaneal bursa (between Achilles tendon and calcaneus, causing posterior heel pain — Haglund’s deformity); subcutaneous calcaneal bursa (under the heel skin); intermetatarsal bursae (between metatarsal heads); and the first MTP bursa (overlying bunions). Each has distinct symptoms and treatment approaches based on location.
What causes bursitis on the bottom of the foot?
Plantar forefoot bursitis (intermetatarsal bursitis) is caused by repetitive pressure under the metatarsal heads from high heels, tight pointy shoes, or activities involving prolonged toe plantarflexion. It often accompanies or mimics Morton’s neuroma with burning, aching forefoot pain. Heel bursitis develops from direct pressure (poorly fitting shoes rubbing the heel) or chronic microtrauma. Inflammatory arthritis (RA) causes widespread bursitis throughout the foot.
How is foot bursitis treated?
Acute bursitis responds to RICE, NSAIDs, and offloading the inflamed bursa with padding or accommodative orthotics. Cortisone injections provide faster relief for retrocalcaneal and intermetatarsal bursitis but may risk tendon weakening with repeated injections near the Achilles. Footwear modification is essential to eliminate the friction or pressure causing the inflammation. Chronic bursitis unresponsive to conservative care may require surgical bursectomy.
In-Office Treatment at Balance Foot & Ankle
Dr. Tom Biernacki DPM provides expert in-office evaluation and treatment at Balance Foot & Ankle, serving Howell and Bloomfield Township, Michigan. Learn more about scheduling your appointment at Balance Foot & Ankle. Same-day appointments available. (810) 206-1402 | New Patient Information
Dr. Tom Biernacki, DPM is a board-certified foot & ankle surgeon (ABFAS & ABPM) at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has made him one of the most-followed foot & ankle educators on YouTube.