Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle, Howell & Bloomfield Township, MI
Last reviewed: May 2026
The most important clinical decision with Intermetatarsal Bursitis: Symptoms, Diagnosis & How It Differs from Morton’s Neuroma isn’t which treatment to choose — it’s identifying which subtype you have first. Our podiatrists see patients treated for the wrong subtype for months before the correct diagnosis leads to full resolution. Call (810) 206-1402 — expert podiatric care across Michigan.
Intermetatarsal bursitis is an often-overlooked cause of forefoot pain that is frequently confused with Morton’s neuroma — and for good reason: they occur in the same location, cause similar symptoms, and often coexist. Understanding the difference drives better treatment outcomes.
Intermetatarsal Bursitis vs. Morton’s Neuroma: Key Differences
| Feature | Intermetatarsal Bursitis | Morton’s Neuroma |
|---|---|---|
| Pathology | Inflamed fluid-filled bursa between metatarsal heads | Perineural fibrosis and enlargement of the common digital nerve |
| Pain quality | Aching, pressure; less electric or shooting | Electric, burning, shooting into toes; “pebble in shoe” |
| Location | Between metatarsal heads; 3rd–4th space most common | Same web spaces; 3rd–4th most common |
| Mulder’s click | May have click but less characteristic | Positive Mulder’s click (highly specific) |
| Ultrasound appearance | Anechoic (dark) fluid-filled sac; compressible; no internal vascularity | Solid hypoechoic mass; spindle-shaped; non-compressible |
| MRI appearance | Fluid-intensity mass in web space; thin wall | Solid low-signal mass; associated with MRI dark signal on T1 |
| Forefoot squeeze test | Pain on squeeze without Mulder’s click | Click AND pain on Mulder’s maneuver |
| Response to corticosteroid injection | Often dramatically effective — reduces bursal fluid and inflammation | Variable; better for associated bursitis component |
| Coexistence | Present alongside neuroma in ~30–40% of cases | See above |
Causes and Contributing Factors
Intermetatarsal bursae develop between adjacent metatarsal heads as a response to repetitive friction between the metatarsal heads during walking. Contributing factors include: high-heeled shoes (shift weight to the forefoot and increase intermetatarsal pressure), excessive forefoot pronation (increases medial load at 2nd–3rd web space), narrow toe box shoes (compress adjacent metatarsal heads), and inflammatory arthritis (rheumatoid arthritis frequently causes intermetatarsal bursitis as part of the forefoot syndrome).
Treatment for Intermetatarsal Bursitis
| Treatment | Mechanism | Evidence | Notes |
|---|---|---|---|
| Wide toe box shoes + heel height reduction | Reduces intermetatarsal compression and forefoot load | Strong (addressing cause) | First and most important step; switch heel height before any intervention |
| Metatarsal pad (placed proximal to MT heads) | Spreads metatarsal heads; reduces intermetatarsal pressure at the bursa | Good | Placement critical — 1 cm proximal to MT head; trial in office before permanent insole placement |
| Corticosteroid injection (ultrasound-guided) | Reduces bursal inflammation; collapses bursa | Good — often very effective for pure bursitis | US guidance avoids tendon injection; may need 1–3 injections spaced 6–8 weeks |
| Custom orthotic with metatarsal pad | Individualized load redistribution across forefoot | Moderate | Best when biomechanics driving excess forefoot load; needed for recurrent bursitis |
| NSAIDs (oral or topical) | Reduces bursal inflammation acutely | Moderate | Short-term adjunct; not a standalone treatment |
| Surgical bursectomy | Excision of bursa; often combined with neuroma excision if present | Good for combined bursa + neuroma pathology | Reserved for failed conservative treatment; often found alongside neuroma at surgery |
Balance Foot & Ankle uses ultrasound in the office to distinguish intermetatarsal bursitis from Morton’s neuroma and to guide injections at Howell and Bloomfield Township. Call (810) 206-1402.
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American Academy of Orthopaedic Surgeons: Morton’s Neuroma / Intermetatarsal Bursitis
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For a complete clinical overview: Heel Pain Causes & Treatment Guide — every cause of foot and heel pain diagnosed
What causes sharp heel pain in the morning?
Plantar fasciitis — the fascia tightens overnight and micro-tears with first steps. Heel spurs and Achilles tendonitis cause similar pain.
When should I see a podiatrist for heel pain?
If heel pain persists more than 2 weeks, limits walking, or follows an injury with bruising or swelling.
Doctor Answer
What is intermetatarsal bursitis and how does it differ from Morton’s neuroma?
Intermetatarsal bursitis is inflammation of the small fluid-filled sac between adjacent metatarsal heads, causing forefoot pain and swelling similar to Morton’s neuroma. Unlike neuroma, which involves nerve thickening, bursitis primarily involves bursal sac inflammation. The two often coexist and can be difficult to distinguish clinically. MRI or ultrasound differentiates them. I treat bursitis with metatarsal pads, cortisone injection into the bursa, and activity modification. If bursitis recurs or coexists with a symptomatic neuroma, surgical excision addresses both simultaneously.
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.