Sesamoiditis Treatment: Big Toe Pain Under the Joint | Dr. Tom

Sesamoid anatomy in 30 seconds

Most people don’t know they have sesamoid bones until one hurts. The sesamoids are two small bones — typically about the size of a pea — embedded WITHIN the tendon under your big toe joint (1st MTP). They function as a fulcrum, increasing the leverage of the flexor hallucis brevis tendon. Every time you push off your big toe (walking, running, dancing, jumping, climbing stairs), these two bones bear several multiples of your body weight in compressive force.

The medial (tibial, inside) sesamoid is the most commonly injured — it’s larger and bears more load. The lateral (fibular, outside) sesamoid is involved in about 20-25% of cases.

Why sesamoid problems are so frustrating to heal: the sesamoids have a limited blood supply. Once injured, they heal slowly even with perfect immobilization. Walking on them keeps the inflammation cycle going indefinitely. This is why patients who “try to push through it” often spend 6-12+ months in chronic pain before finally complying with offloading.

Symptoms — telling sesamoiditis from other forefoot pain

Classic sesamoid pain pattern:

• Sharp pain directly under the big toe joint — not at the front, not at the side, specifically just behind the ball of the big toe
• Pain that intensifies with push-off — most pronounced when transitioning from heel-strike to toe-off in walking, or during dance, running, climbing stairs
• Mild swelling at the inner ball of foot — sometimes visible bruising on the bottom
• Pain with passive dorsiflexion of the big toe — when someone bends your big toe upward toward your shin
• Worse barefoot on hard floors, better in cushioned shoes

What it’s NOT (commonly confused conditions):

• Bunion pain — pain on the inside of the big toe joint (medial), not underneath. Different location, different cause.
• Capsulitis of the great toe MTP — pain on top of the big toe joint, not underneath.
• Morton’s neuroma — pain between toes (usually 3rd-4th metatarsal space), often with burning/numbness; sesamoid pain is mechanical, not neural.
• Metatarsalgia — diffuse pain across all metatarsal heads; sesamoid pain is point-specific to under the great toe.
• Plantar fasciitis — pain at the inner heel, not under the toe.

How we diagnose — clinical exam plus targeted imaging

The diagnosis is largely clinical, but imaging confirms severity and rules out stress fracture. My standard workup:

Clinical exam tests

• Direct palpation — sharp tenderness at exactly the medial or lateral sesamoid (under big toe MTP)
• Passive dorsiflexion stretch — pain increases when the great toe is bent upward
• Resisted plantarflexion of the big toe — reproduces pain
• Standing on tiptoe — typically painful

Imaging — sesamoid axial X-ray view (often missed)

Standard AP and lateral foot X-rays do NOT show the sesamoids well. A specific sesamoid axial view (also called the “sesamoid view” or “tangential view”) is essential. This view shows fracture lines, fragmentation, displacement, and bipartite anatomy that mimics fracture.

If X-rays are normal but symptoms persist beyond 4-6 weeks, MRI is the next step. MRI shows bone marrow edema (the earliest sign of stress reaction) before any cortex fracture is visible, and differentiates true stress fracture from inflammation.

Bipartite sesamoid — important normal variant

About 7-30% of people have a naturally divided medial sesamoid (bipartite — two separate bone pieces from birth). On X-ray, this can look like a fracture but isn’t. Comparison views of the opposite foot (which often has the same bipartite anatomy) help distinguish congenital bipartite from true fracture. MRI definitively differentiates.

Treatment — the offloading-first protocol

Sesamoid problems live and die by offloading. The single most important step is reducing the load on the sesamoid until inflammation resolves and any stress reaction heals. Here’s the ladder, ranked by clinical experience:

Step 1: Strict offloading (Level A evidence)

• CAM walker boot for 4-6 weeks for moderate-severe sesamoiditis or any confirmed stress reaction. The boot’s rocker bottom eliminates the push-off phase that loads the sesamoids.
• Carbon fiber rocker plate in a regular shoe — alternative when a boot isn’t feasible. Restricts dorsiflexion at the great toe MTP. Less ideal than a boot but better than nothing.
• Sesamoid-relief padding (J-pad or U-cutout) — felt or gel pad with the sesamoid area cut out, taped to the foot or built into the orthotic. Bridges the load across surrounding metatarsals.
• No running, jumping, dancing, or aggressive uphill walking during this phase. Cycling, swimming, upper body fitness are fine.

Step 2: Custom orthotic with sesamoid relief (after acute phase)

Once acute pain has subsided, transition to a custom orthotic that features:

• U-shaped sesamoid cutout (relieves direct pressure)
• Morton’s extension (rigid material extending under the 1st MTP, reducing dorsiflexion)
• Slight metatarsal pad (redistributes load proximally)
• Firm shell — soft cushioning alone doesn’t reduce the pathologic load

This is what allows return to normal shoes without re-injuring the sesamoid. Keep wearing the orthotic for 3-6 months post-recovery as the bone fully consolidates.

Step 3: Taping technique (for activity transitions and prevention)

The most-searched sesamoid query is “kt tape for sesamoiditis” — and taping is actually a useful supplementary tool. The technique I use:

• Anchor strip across the ball of the foot proximal to the sesamoids
• Restraint strip from the anchor, looping AROUND the great toe to limit dorsiflexion
• Cross strip diagonally over the sesamoid area to add support
• Apply with the great toe in slight plantarflexion (slightly pointing down)

Taping is not a substitute for the orthotic and offloading — it’s a useful adjunct during the return-to-activity phase. The internal link to our dedicated sesamoid taping technique guide shows the step-by-step.

Step 4: NSAIDs (short-term)

Oral NSAIDs (ibuprofen, naproxen, meloxicam) help with acute inflammation. Limit to 7-14 days. Topical diclofenac (Voltaren Gel) over the sesamoid area is a useful adjunct with fewer systemic side effects. Don’t use NSAIDs to “push through” — they mask pain that’s signaling continued damage.

Step 5: Cortisone injection — selectively, not first-line

Targeted cortisone injection into the sesamoid bursa can help refractory inflammatory sesamoiditis. Limit to 1-2 injections per affected sesamoid; more increases sesamoid weakening and fracture risk. NEVER inject if a stress fracture is suspected or confirmed.

Step 6: PRP and shockwave (Level B evidence)

For chronic sesamoiditis that has failed 3-4 months of conservative care, platelet-rich plasma (PRP) injection or extracorporeal shockwave therapy (EPAT) can stimulate healing. Modest but real evidence. Often the last conservative step before considering surgical sesamoidectomy.

Step 7: Surgical sesamoidectomy — last resort

For chronic refractory sesamoiditis, confirmed non-union of a sesamoid stress fracture, or symptomatic avascular necrosis — surgical removal of the affected sesamoid. The medial sesamoid is the most commonly removed.

Outcomes: 70-85% patient satisfaction in published series, but there are real biomechanical trade-offs. Removing a sesamoid permanently weakens push-off strength and increases the risk of hallux varus (great toe drifting medially) or hallux valgus progression. I reserve sesamoidectomy for patients who’ve truly failed 6+ months of structured conservative care and have confirmed non-union or AVN. Most patients can avoid surgery.

Recovery timeline expectations

• Mild sesamoiditis (no stress reaction): 4-6 weeks with strict offloading + orthotic. Most patients back to running by week 8-10.
• Sesamoid stress reaction (bone edema on MRI): 6-8 weeks in boot + 4 weeks transition. Running typically resumes at week 12.
• Sesamoid stress fracture (visible cortex break): 8-12 weeks immobilization + 6 weeks transition. Running at 4-6 months.
• Sesamoid non-union (fracture that didn’t heal): If symptomatic — surgery. Recovery from sesamoidectomy: 6-8 weeks NWB, return to running at 4-6 months, with some residual push-off weakness expected.

Prevention — for athletes and dancers

• Custom orthotic with morton’s extension for at-risk activities
• Modify footwear: stiffer-soled running shoes, ballet flats with sesamoid pads, avoid completely flat barefoot training
• Calf and great toe mobility work: tight Achilles + restricted dorsiflexion at the great toe loads the sesamoids more
• Gradual training progression: stress fractures classically follow sudden mileage increases
• Cross-train to distribute load: cycling, swimming, elliptical reduce repetitive sesamoid loading

When to see a podiatrist

• Pain under the big toe ball has persisted >2 weeks despite OTC NSAIDs + rest
• Pain worsening with activity over multiple weeks
• Visible bruising at the inner ball of foot
• You’re a runner/dancer with new big-toe-base pain — sesamoid stress fracture is a real risk
• Pain woke you at night

At Balance Foot & Ankle, sesamoid evaluation includes a focused clinical exam, sesamoid axial X-ray view in-office, and MRI ordering if indicated. We custom-cast orthotics with sesamoid relief and Morton’s extension in our Howell location. Dr. Tom Biernacki, DPM, FACFAS has performed sesamoidectomy and reconstructive sesamoid procedures across both Howell and Bloomfield Hills offices.

Frequently asked questions

How long does sesamoiditis take to heal?

Most cases of mild sesamoiditis resolve within 4-6 weeks of strict offloading and orthotic use. Sesamoid stress fractures need 8-12 weeks of immobilization. Patients who continue activity often have symptoms persisting 6 months or more.

Is sesamoiditis the same as turf toe?

No — these are different injuries with overlapping presentations. Turf toe is a sprain of the plantar plate at the great toe MTP from a hyperextension injury. Sesamoiditis is inflammation of the sesamoid bones themselves. They can co-occur, but turf toe typically presents after a specific hyperextension event while sesamoiditis develops gradually with overuse.

Can I run with sesamoiditis?

No — running on inflamed sesamoids prevents healing and can progress to a stress fracture. During the acute phase you should stop running entirely. Cross-train (cycling, swimming, elliptical) to maintain fitness. Return to running gradually after 4-8 weeks of pain-free walking, with custom orthotics + supportive footwear.

Should I get a cortisone injection for sesamoiditis?

Selectively — only after a clear inflammatory diagnosis (not a stress fracture), only 1-2 times maximum per sesamoid, and only after first-line conservative measures have failed. Cortisone can weaken sesamoid bone and increase fracture risk if overused. A targeted ultrasound-guided injection at the right time helps; aggressive repeated injections cause harm.

What shoes are best for sesamoiditis?

Stiff-soled rocker shoes — HOKA Bondi, Brooks Glycerin GTS, and similar maximum-cushion rocker designs unload the forefoot during push-off. Avoid flexible/minimalist shoes during recovery. Custom orthotics with Morton’s extension + sesamoid relief multiply the protection.

Will sesamoiditis come back?

Recurrence rates depend on what caused the first episode. Athletes/dancers who return to the same activity load without addressing footwear or biomechanics have ~30% recurrence. Those who use custom orthotics + maintain modified training intensity have under 10% recurrence. Bipartite sesamoid patients have slightly higher lifetime recurrence risk.

Will I lose push-off power if I have a sesamoid removed?

Some, yes. Single sesamoidectomy (removing just one of the two bones) reduces but doesn’t eliminate push-off power. Most patients return to full pre-surgery athletic levels with slight residual weakness. Double sesamoidectomy (rare) significantly compromises push-off and is avoided when possible.

The bottom line

Sesamoid problems are uniquely punishing because the affected bones have poor blood supply and continued walking keeps the inflammation cycle alive. Most cases resolve completely with 4-8 weeks of strict offloading + custom orthotic — but most patients don’t comply long enough to heal. If you’ve had pain under your big toe ball for more than 2 weeks, stop walking on it, get a sesamoid axial X-ray (and MRI if needed), and commit to the full offloading protocol. The patients who actually follow this advice do well; the patients who half-comply spend 6-12 months in low-grade pain.

— Dr. Tom Biernacki, DPM, FACFAS