Sesamoiditis 2026: Causes, Symptoms & Treatment | Big Toe Pain

What Is Sesamoiditis?

If you’re a dancer, runner, or someone who spends a lot of time on the balls of their feet — and you’ve developed a persistent, nagging ache right under the big toe joint — you may be dealing with sesamoiditis.

The sesamoid bones are two tiny, pea-sized bones embedded within the flexor hallucis brevis tendon, located directly beneath the first metatarsophalangeal (MTP) joint — the big toe joint. They function like pulleys: they increase mechanical advantage for the tendons that flex the big toe, and they act as shock absorbers for forces transmitted through the ball of the foot during push-off.

In our clinic, sesamoiditis accounts for about 3–5% of all foot pain presentations. It’s more common in athletes — particularly ballet dancers, runners, and basketball players — but we also see it in patients with high arches (who load the ball of the foot more heavily) and in occupations that require prolonged standing on hard surfaces.

Sesamoiditis Symptoms

Sesamoiditis has a distinctive pain pattern that most patients describe the same way: a dull, achy pain under the big toe joint that gets sharper with push-off during walking, running, or going up stairs. Unlike a blister or plantar fasciitis, the pain is very focal — you can put a finger directly on the spot that hurts.

• Pain location: Directly under the ball of the foot, near the base of the big toe — not the arch, not the heel
• Pain character: Aching at rest, sharp with push-off or big toe extension (bending up)
• Swelling: Mild swelling at the ball of the foot, sometimes bruising if there’s an acute injury
• Tenderness to palpation: If you press the pad directly under the big toe joint, you reproduce the pain exactly
• Stiffness: Big toe joint may feel stiff or reluctant to bend upward
• Onset: Gradual (overuse) or sudden (acute fracture from a fall or jump landing)

One hallmark finding I check for is pain with passive dorsiflexion — bending the big toe upward. If this reproduces the pain under the joint, sesamoiditis is very likely. If the pain is more at the top of the joint or involves the joint itself (clicking, crepitus), I look for other causes.

What Causes Sesamoiditis?

Sesamoiditis is almost always an overuse injury — the sesamoid bones absorb repetitive loading forces until the surrounding tissue becomes inflamed. The most common mechanism in our clinic is sudden increase in training volume (a runner adding too many miles too fast) or a change in footwear (switching from cushioned to minimalist shoes).

Risk factors we identify most frequently:

• High-arched foot (pes cavus): Weight distribution shifts heavily to the ball of the foot
• Low-cushion footwear: Flat dress shoes, minimalist running shoes, high heels (high heels shift weight forward onto the sesamoids)
• Athletic activities: Ballet, running, tennis, basketball, soccer — any sport with repetitive push-off
• Acute trauma: A single hard landing on the ball of the foot can cause acute sesamoid fracture, which presents like sesamoiditis but is more serious
• Prominent sesamoid bones: Some people’s sesamoids sit lower than average, making them more exposed to ground forces
• Inflammatory arthritis: Gout, rheumatoid arthritis, and psoriatic arthritis can all affect the sesamoid area

How Is Sesamoiditis Diagnosed?

Diagnosis starts with a careful clinical exam. I palpate each sesamoid individually — pressing directly on the medial (tibial) sesamoid, then the lateral (fibular) sesamoid — to determine which bone is involved and whether the pain is in the bone itself or the surrounding tendon tissue. Most sesamoiditis cases involve the medial (inner) sesamoid.

X-rays are ordered on the first visit to rule out sesamoid fracture. The standard views include a sesamoid axial view, which shows the bones face-on. One important pitfall: many patients have a naturally bipartite sesamoid — a sesamoid that developed in two pieces rather than one. This is a normal anatomical variant present in 10–30% of the population, and it can look exactly like a fracture on X-ray. Differentiating a bipartite sesamoid from an acute fracture requires looking at the margins of the bone — fractures have sharp, jagged edges; bipartite sesamoids have smooth, corticated borders.

If X-ray findings are equivocal, I order an MRI. MRI is the gold standard for sesamoiditis — it shows bone marrow edema (swelling inside the bone), tendon inflammation, and stress fractures that plain X-rays miss. This distinction matters because a sesamoid stress fracture requires a significantly longer recovery than pure sesamoiditis.

Differential diagnosis for sesamoid pain includes: sesamoid stress fracture, sesamoid avascular necrosis (AVN), sesamoiditis from gout or rheumatoid arthritis, plantar plate tear at the MTP joint, interdigital neuroma, and metatarsalgia (general ball-of-foot pain). Getting the diagnosis right determines treatment — which is why thorough workup matters.

Sesamoiditis Treatment Options

Sesamoiditis treatment follows a structured ladder from conservative to more involved, depending on severity and how long you’ve had symptoms. The single most important thing is relative rest — sesamoiditis that’s treated while continuing full activity will not heal, period.

Conservative Treatment (Weeks 1–6)

• Activity modification: Eliminate or significantly reduce the aggravating activity. For runners, cross-training with swimming or cycling maintains fitness without sesamoid loading.
• Sesamoid padding: A felt or foam donut pad with a cutout over the sesamoid dramatically reduces pressure on the inflamed bone during walking. This is often the single most effective immediate intervention.
• Taping/strapping: Tape that holds the big toe in slight plantarflexion (pointing down) reduces dorsiflexion stress on the sesamoids during push-off.
• NSAIDs: Ibuprofen or naproxen for 2–3 weeks to reduce inflammation. Take with food.
• Ice: 15–20 minutes of ice applied to the ball of the foot after activity reduces local inflammation.
• Stiff-soled footwear: A shoe with a rigid sole prevents the big toe from bending up during walking, which is the motion that most aggravates sesamoids. A carbon fiber foot plate inside the shoe achieves the same effect.

Custom Orthotics

Custom orthotics are one of the most effective long-term solutions for sesamoiditis, especially in patients with structural foot issues (high arch, overpronation). I design orthotics with a sesamoid relief cutout — a small depression in the orthotic material directly under the sesamoids that offloads them with every step. Paired with a metatarsal pad to redistribute forefoot pressure, custom orthotics dramatically reduce recurrence rates.

Corticosteroid Injection

For sesamoiditis that hasn’t responded to 4–6 weeks of conservative care, a corticosteroid (cortisone) injection directly into the sesamoid area can provide significant relief and allow healing to progress. I use ultrasound guidance for precision. A note of caution: I limit injections around sesamoids to 1–2 per year, as repeat injections can weaken the surrounding tendon and in rare cases contribute to sesamoid avascular necrosis.

Immobilization Boot or Cast

For sesamoid stress fractures (confirmed by MRI), a walking boot or short-leg cast for 6–8 weeks is necessary. This is non-negotiable — walking on a sesamoid stress fracture without offloading leads to complete fracture and a much longer recovery. Patients are often frustrated by boot immobilization, but attempting to accelerate this timeline consistently leads to worse outcomes.

Sesamoidectomy (Surgery)

Sesamoidectomy — surgical removal of the sesamoid bone — is reserved for cases that have failed 6+ months of comprehensive conservative care, or for sesamoid avascular necrosis (where the bone has lost its blood supply and is dying). I’m conservative with this recommendation because removing a sesamoid alters the biomechanics of the big toe joint and can lead to hallux valgus (bunion) deformity or cock-up toe deformity if not managed carefully. That said, for appropriate candidates, sesamoidectomy provides excellent pain relief.

Sesamoiditis Recovery Time

Recovery time depends heavily on the underlying diagnosis. Pure sesamoiditis (inflammation without fracture) typically resolves in 6–8 weeks with proper treatment and activity modification. Sesamoid stress fractures take 8–12 weeks in a boot, followed by 4–6 weeks of gradual return to activity. Avascular necrosis (rare) can take 6–12 months to manage, sometimes requiring surgery.

The most common reason sesamoiditis doesn’t resolve in the expected timeframe is failure to adequately reduce the aggravating activity. I’ve had patients do everything right — padding, orthotics, NSAIDs — but continue to run 40 miles per week. The sesamoids cannot heal under those conditions. Relative rest isn’t optional; it’s the treatment.

Frequently Asked Questions

Can sesamoiditis heal on its own without treatment?

Mild sesamoiditis can improve with strict rest and activity modification, but “healing on its own” without any intervention usually means months of limping through daily life while the inflammation slowly subsides. Properly applied padding and activity modification accelerates recovery from months to 6–8 weeks. Without treatment, the risk is also progression to a stress fracture, which takes significantly longer to heal.

How do I know if I have a sesamoid fracture vs sesamoiditis?

Clinically, it’s difficult to distinguish without imaging. Both cause the same ball-of-foot pain under the big toe joint. Clues pointing toward fracture: sudden-onset pain after a specific incident (a jump, fall, or step off a curb), significant bruising in the first 24–48 hours, pain that’s severe rather than achy. An X-ray followed by MRI if needed is the only reliable way to differentiate. Don’t assume it’s “just sesamoiditis” without ruling out fracture — the treatments are different.

What shoes are best for sesamoiditis?

During active sesamoiditis, prioritize: (1) a rigid or semi-rigid midsole that limits big toe dorsiflexion, (2) significant forefoot cushioning, and (3) a wide toe box. Good options include stability running shoes with a rockered sole (the rocker acts like a carbon fiber plate, reducing big toe joint motion), post-op shoes, and clogs with built-in arch support. Avoid flat shoes, minimalist footwear, flip-flops, and anything with a heel drop under 4mm.

Can I run with sesamoiditis?

Generally, no — not during the acute phase. Every push-off during running loads the sesamoids significantly. Running through sesamoiditis consistently prolongs recovery and risks converting mild inflammation into a stress fracture. Pool running and cycling are good alternatives that maintain cardiovascular fitness without sesamoid loading. I typically clear patients to return to running in the 6–10 week range for uncomplicated cases, starting with short distances on soft surfaces.

The Bottom Line

Sesamoiditis is a common, treatable cause of ball-of-foot pain that responds well to conservative care when caught early and managed properly. The non-negotiables are relative rest, sesamoid padding, and appropriate footwear. Get imaging early to rule out fracture — it changes the treatment plan significantly. Most patients are back to full activity in 6–8 weeks with the right combination of offloading, anti-inflammatories, and graduated return to activity.

Sources

1. Cohen BE. Hallux sesamoid disorders. Foot Ankle Clin. 2009;14(1):91-104.
2. Bichara DA, Henn RF, Theodore GH. Sesamoidectomy for hallux sesamoid fractures. Foot Ankle Int. 2012;33(9):704-706.
3. Mittlmeier T, Haar P. Sesamoid disorders of the first metatarsophalangeal joint. Clin Orthop Relat Res. 2006;451:246-258.
4. Lui TH. Endoscopic sesamoidectomy. Arthrosc Tech. 2016;5(5):e1063-e1066.

Related reading: Plantar Fasciitis Secrets — our complete heel pain guide: what works and what to avoid.