Painful Heel Lump or Bump — Causes by Location, Treatment & When to Worry

✅ Medically reviewed by Dr. Thomas Biernacki, DPM — Board-Certified Podiatrist · Last updated April 7, 2026

Medically reviewed by Dr. Carl Jay, DPM
Board-Certified Podiatric Surgeon · Balance Foot & Ankle
Last reviewed: April 2026

Table of Contents

1. Bumps on the Back of the Heel
2. Lumps on the Bottom of the Heel
3. Bumps on the Side of the Heel
4. Diagnosis Guide by Location
5. Home Treatment Protocol
6. Best Products for Heel Bumps
7. Professional Treatment Options
8. Warning Signs — When to See a Podiatrist
9. Frequently Asked Questions
10. The Bottom Line

You felt a hard bump on the back of your heel while putting on shoes — or maybe you noticed a firm nodule on the bottom of your foot while stretching in the morning. Bumps on the heel are alarming because they make you wonder: is this a cyst? A bone spur? Something serious? The good news is that most heel bumps are benign and treatable. The key is knowing what you’re dealing with.

At Balance Foot & Ankle, we evaluate heel lumps and bumps regularly. The diagnosis is almost always straightforward once we know the exact location and characteristics. Below, we break down every common cause by location so you can start narrowing down what’s happening — and what to do about it.

Bumps on the Back of the Heel

Haglund’s Deformity (“Pump Bump”)

Haglund’s deformity is a bony enlargement of the posterolateral heel — the upper back corner where the shoe counter sits. It’s called “pump bump” because rigid-backed shoes (pumps, dress shoes, skates) aggravate it by pressing directly on the prominence. The bump is bone — you can’t push it in. It becomes painful when friction from the shoe creates inflammation of the overlying bursa (retrocalcaneal bursitis). The combination of bony bump plus inflamed bursa can make the back of the heel red, swollen, and very tender.

Insertional Achilles Tendinitis (Achilles Enthesopathy)

The Achilles tendon inserts into the back of the calcaneus (heel bone). When this insertion point becomes inflamed, calcified, or develops bone spurs, a painful bump forms at the posterior heel — right where the Achilles meets bone. Unlike Haglund’s (which is on the side/back of the heel above the Achilles insertion), insertional Achilles tendinitis produces a bump exactly where the tendon attaches. The bump may feel firm or slightly enlarged, and pain worsens with walking (especially uphill), stair climbing, and pressing on the back of the heel.

Retrocalcaneal Bursitis

A bursa is a fluid-filled cushion between the Achilles tendon and the heel bone. When inflamed (bursitis), it swells and creates a soft, painful bump at the back of the heel just in front of the Achilles tendon. Unlike Haglund’s (which is hard bone), retrocalcaneal bursitis feels somewhat compressible. It often occurs alongside Haglund’s deformity — the bony prominence irritates the bursa, creating a painful combination. Rest, ice, and heel lifts typically reduce the swelling.

Lumps on the Bottom of the Heel

Plantar Fibroma

A plantar fibroma is a benign fibrous nodule that grows within the plantar fascia — the thick band of tissue on the sole of the foot. The nodule is firm, usually 1–3cm in size, and located in the arch area or mid-sole. It can be painful when walking or when direct pressure is applied (like stepping on a pebble). Plantar fibromas are not cancerous and don’t become cancerous. However, they can slowly enlarge and may develop additional nodules over time (a condition called plantar fibromatosis or Ledderhose disease).

Heel Spur (Calcaneal Spur)

A heel spur is a calcium deposit that forms where the plantar fascia attaches to the calcaneus. You typically can’t feel it as a “bump” — it’s inside the bone. But it can cause localized pain at the bottom of the heel, particularly at the attachment point. Heel spurs are visible on X-ray and are found in approximately 50% of people with plantar fasciitis. Interestingly, many people have heel spurs with zero pain, which means the spur itself may not be the pain source — the associated plantar fasciitis is.

Adventitious Bursa (Pressure Callus with Bursa)

Chronic pressure on the bottom of the heel (from standing on hard floors, being overweight, or wearing flat shoes) can create a protective bursa and thickened callus tissue that feels like a firm lump on the sole. This is the body’s attempt to cushion an overloaded area. The lump is benign and typically responds to cushioned insoles and offloading.

Bumps on the Side of the Heel

Ganglion Cyst

A ganglion cyst is a fluid-filled sac that develops near a joint or tendon sheath. On the foot, they most commonly appear on the top of the foot or around the ankle, but can occasionally develop near the heel. Ganglion cysts are round, smooth, and may be somewhat soft and compressible (like pressing on a water balloon). They may fluctuate in size — growing and shrinking over weeks. They’re benign but can be painful if they press on a nerve.

Calcaneal Exostosis

An exostosis is an overgrowth of bone on the surface of the calcaneus. These bony bumps can develop on the sides, bottom, or back of the heel as a response to chronic stress, old trauma, or as part of Haglund’s deformity. They’re hard, immovable, and slowly enlarging. X-ray confirms the diagnosis and distinguishes exostosis from soft tissue masses.

Diagnosis Guide by Location

Home Treatment Protocol

Treatment varies by condition, but these measures address the most common causes:

For back-of-heel bumps (Haglund’s/bursitis): Switch to shoes with a soft, flexible heel counter — or shoes with no heel counter at all (like clogs or slip-ons). Apply a gel heel cushion or moleskin over the bump to reduce friction. Ice the back of the heel for 15 minutes after shoe wear. A 1/4-inch heel lift placed inside the shoe reduces tension on the Achilles insertion and shifts the foot forward, away from the shoe counter.

For bottom-of-heel lumps (plantar fibroma/heel spur): Orthotic insoles with arch support offload the plantar fascia and reduce pressure on fibromas. A donut-shaped felt pad placed around (not over) the fibroma eliminates direct ground pressure. For heel spurs, the treatment is identical to plantar fasciitis — arch support, calf stretching, and cushioned footwear.

For all heel bumps: Avoid rigid-soled, flat shoes. Avoid going barefoot on hard surfaces. Consistent cushioning and offloading allow the inflamed tissue to calm down.

Best Products for Heel Bumps and Lumps

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Professional Treatment Options

Corticosteroid injection: For retrocalcaneal bursitis and plantar fibromas, a targeted cortisone injection provides rapid inflammation relief. For fibromas, intralesional injection can sometimes shrink the nodule. We limit injections near the Achilles insertion due to tendon rupture risk.

Extracorporeal shockwave therapy (ESWT): For plantar fibromas and insertional Achilles tendinitis that don’t respond to conservative care, shockwave therapy stimulates healing by increasing blood flow and breaking down calcified tissue. We typically perform 3–5 treatments spaced 1 week apart.

Custom orthotics with offloading accommodations: For plantar fibromas, custom orthotics can be fabricated with a precise cutout that eliminates pressure directly over the nodule while supporting the surrounding arch. This level of precision isn’t possible with OTC insoles.

Surgical excision: For Haglund’s deformity that doesn’t respond to conservative treatment, surgical resection of the bony prominence provides permanent relief. For plantar fibromas, surgical excision is reserved for cases that significantly limit walking despite all conservative measures — recurrence rates after fibroma excision are approximately 25%, which is why we exhaust non-surgical options first.

Warning Signs — When to See a Podiatrist