Hammer Toe

Lower Limb

Overview

Hammer toe is a fixed or flexible deformity of the proximal interphalangeal (PIP) joint, typically affecting the second through fifth toes, resulting in a claw-like appearance. The condition develops from muscular imbalances, tight intrinsic foot muscles, and biomechanical dysfunction, often exacerbated by poorly fitting footwear. While primarily a structural deformity, it can cause significant pain, callus formation, and functional impairment if left untreated.

Pathophysiology

Hammer toe develops through progressive muscular imbalance between extrinsic and intrinsic foot muscles. Tightness in the flexor digitorum longus and brevis muscles, combined with weakness or insufficiency of the lumbrical and interosseous muscles, causes the PIP joint to remain in flexion while the metatarsophalangeal (MTP) joint hyperextends. This imbalance is often secondary to metatarsal pathology (hallux limitus, metatarsalgia), pronation dysfunction, or chronic shortening from tight footwear. The sustained abnormal posture creates dorsal pressure and callus formation over the PIP joint and nail bed, with potential secondary osteoarthritis and fixed contractures developing over time.

Patient Education

Hammer toe prevention and early management focus on restoring proper foot biomechanics through intrinsic muscle strengthening, reducing external pressure with appropriate footwear, and addressing underlying metatarsal dysfunction to prevent progression from flexible to fixed deformity.

Typical Presentation

Site

Dorsal aspect of the proximal interphalangeal joint, typically second toe (most common); can affect multiple toes. Pain may also occur at the MTP joint or plantar metatarsal head region.

Quality

Sharp, localized pain or pressure over the PIP joint; burning or aching pain; callus-related discomfort described as tender, raw, or sensitive to touch

Intensity

Mild to moderate, typically VAS 3-6/10; increases with prolonged standing or tight footwear; may become severe in fixed deformities with secondary osteoarthritis

Aggravating

Prolonged standing or walking, tight or high-heeled footwear, activities requiring tight shoe fit, pressure directly over the dorsal PIP joint, walking on hard surfaces, increased activity levels

Relieving

Loose, wide-toe-box footwear, toe spacers or padding, ice application, rest and elevation, intrinsic foot muscle exercises, callus removal, MTP joint mobilization

Associated

Callus or corn formation over the PIP joint, toe nail deformity or discoloration, bunions (hallux valgus) or metatarsalgia suggesting underlying MTP dysfunction, toe crowding, visible dorsal PIP prominence, secondary MTP joint pain, difficulty walking or running, cosmetic concern

Orthopaedic Tests

Test descriptions are written with AI assistance from standard clinical texts. Where a test lists Sources, its description has been checked against them; those sources are independent and do not endorse OsteoKit. Accuracy figures and grades (A–D) appear only when checked against the published study; tests without one are marked “No accuracy study”.

Further reading: full test procedures are described in standard clinical examination texts, e.g. Magee & Manske, Orthopedic Physical Assessment (7th ed.), and Cook & Hegedus, Orthopedic Physical Examination Tests: An Evidence-Based Approach (2nd ed.).

No accuracy study

Passive Correction Test (Flexible vs Fixed)

Procedure

Patient seated. Try to straighten the affected toe gently at the PIP joint, with the ankle relaxed and then with the ankle plantarflexed.

Positive Finding

The toe cannot be straightened (fixed), or straightens only with difficulty.

Interpretation

Separates a flexible deformity, which may respond to footwear, padding and exercises, from a fixed one, which is more likely to need a podiatry or surgical opinion.

Sources

No accuracy study

Keratotic Lesion Palpation and Callus Assessment

Procedure

Inspect and palpate the top of the bent PIP joint, the tip of the toe and the sole under the metatarsal head for corns and callus.

Positive Finding

Painful corns over the PIP joint or at the toe tip, or callus under the metatarsal head.

Interpretation

Shows where footwear pressure is causing pain and guides footwear advice and podiatry referral. In people with diabetes or poor circulation, check for skin breakdown and refer early.

Sources

No accuracy study

Visual Inspection and Photographic Documentation

Procedure

Observe the toes in sitting and standing. Note which toes are affected, which joints are bent, and any rotation. Take photos (with consent) to track change.

Positive Finding

Flexion at the PIP joint with the tip of the toe pointing down.

Interpretation

Describes the deformity: a hammer toe bends at the PIP joint, a claw toe also extends at the MTP joint, and a mallet toe bends at the DIP joint. Photos help track progress.

Sources

No accuracy study

MTP Joint Dorsiflexion Test

Procedure

Move the MTP joint of the affected toe up and down, and note its resting position in standing.

Positive Finding

The MTP joint rests in extension, or is painful and swollen.

Interpretation

An extended MTP joint suggests the deformity is progressing towards a claw toe. A painful, swollen second MTP joint suggests plantar plate involvement.

Sources

Not a diagnostic test

Functional Gait Assessment and Shoe Pressure Test

Procedure

Watch the patient walk and check their shoes for toe-box depth and width, and wear marks.

Positive Finding

Pain in shoes, a shallow or narrow toe box, or wear marks over the bent toe.

Interpretation

Guides footwear advice (deeper, wider toe box) and padding. Not a diagnostic test.

Further reading

No accuracy study

Vertical Stress Test (MTP Drawer)

Procedure

Hold the metatarsal head steady with one hand. With the other, grip the base of the toe and push it upwards (towards the top of the foot), comparing with the neighbouring toes.

Positive Finding

The toe shifts upwards more than the neighbouring toes, often with pain.

Interpretation

Suggests plantar plate instability of the MTP joint, a common partner of a hammer toe at the second toe. Refer for imaging and a podiatry or orthopaedic opinion if the toe is drifting or crossing over.

Sources

⚠ Red Flags

  • •Signs of vascular insufficiency: cool toe, color changes (cyanosis or pallor), absent pulses, non-healing wounds
  • •Signs of severe infection: spreading erythema, warmth, purulent drainage, lymphadenopathy, systemic fever
  • •Diabetic neuropathy with loss of protective sensation and risk of ulceration
  • •Severe fixed deformity with complete loss of function or significant limb alignment issues affecting gait biomechanics
  • •History of trauma with possible fracture, dislocation, or vascular injury
  • •Rapidly progressive deformity suggesting underlying rheumatoid or inflammatory arthropathy

⚡ Yellow Flags

  • •Excessive concern with cosmetic appearance disproportionate to functional impact
  • •Belief that only surgical intervention can resolve the condition despite early-stage presentation
  • •Poor health beliefs regarding prevention or conservative management effectiveness
  • •Social isolation or reduced activity participation due to embarrassment about toe appearance
  • •Multiple failed self-treatment attempts suggesting difficulty with compliance or unrealistic expectations
  • •High anxiety regarding treatment outcomes or fear-avoidance of physical activity

Osteopathic Techniques

Conservative care comes first: insoles or orthotics, shoes with a wide toe box, avoiding high heels, padding or shaving painful calluses, and strapping or taping a flexible deformity. These ease pain but do not correct the deformity; surgery is considered once a painful flexion contracture becomes fixed. No trials of osteopathic techniques were found.

Region

Intrinsic foot muscles (lumbricals, interossei) and plantar fascia

Technique

Soft tissue, foot and ankleNo trials found

Rationale

Soft tissue to the plantar fascia, foot muscles and the tissues around the toe joints and ankle ligaments.

How it's done & evidence

How it's done

Hands-on kneading, stroking and sustained pressure to the plantar fascia, the small muscles of the foot and the tissues around the heel and the ankle ligaments.

Evidence in Hammer Toe

Searched 25 Oct 2026: no trials of foot soft tissue in hammertoe.

Sources

Region

Metatarsophalangeal and toe joints

Technique

Articulation, ankle and footNo trials found

Rationale

Gentle glides of the toe, midfoot and ankle joints to restore foot mobility.

How it's done, cautions & evidence

How it's done

Passive, rhythmic, low-velocity glides of the ankle (talocrural), subtalar, midfoot and toe joints, within or up to the end of the available range, often aimed at restoring ankle dorsiflexion.

Cautions

Before mobilising an acute ankle injury, check for fracture with the Ottawa ankle rules (tenderness over either malleolus), and palpate the base of the 5th metatarsal, the navicular and the midfoot for a Lisfranc injury.

Evidence in Hammer Toe

Searched 25 Oct 2026: no trials of toe or foot mobilisation in hammertoe.

Region

Foot and toe tender points

Technique

Counterstrain, foot and ankle tender pointsNo trials found

Rationale

Gentle indirect technique: tender points in the foot and ankle are eased by passive positioning.

How it's done, cautions & evidence

How it's done

Find a tender point in the foot, ankle or calf. Passively move the foot and ankle into the position where the tenderness and tissue tension ease most, and hold it for about 90 seconds while monitoring the point. Return slowly to neutral and re-check.

Cautions

Do not use over an acute fracture, or in a patient who cannot give feedback.

Evidence in Hammer Toe

Searched 25 Oct 2026: no trials of counterstrain in hammertoe.

Region

Gastrocnemius-soleus (calf)

Technique

Muscle energy, calf (gastrocnemius and soleus)No trials found

Rationale

Calf muscle energy technique to ease gastrocnemius-soleus tightness that limits ankle dorsiflexion.

How it's done, cautions & evidence

How it's done

The calf is taken to its barrier by dorsiflexing the ankle. The patient pushes the foot gently down, at about 10–20% effort, against resistance for 5–10 seconds, relaxes for 3–5 seconds, and the new barrier is taken up.

Cautions

Not used with an acute fracture, a joint infection or a bone malignancy; take care with severe osteoporosis or after surgery that limits muscle contraction. Use the least force needed: too much can tear a muscle or pull off a tendon, especially in older patients.

Evidence in Hammer Toe

Searched 25 Oct 2026: no trials of calf muscle energy technique in hammertoe.

Region

Lower leg (tibialis posterior, peroneals)

Technique

Soft tissue, calf and lower legNo trials found

Rationale

Calf and lower-leg soft tissue is usually given alongside a loading or stretching programme.

How it's done & evidence

How it's done

Hands-on kneading, stroking and sustained pressure to the calf (gastrocnemius and soleus), the Achilles tendon and the peroneal and tibial muscles of the lower leg. In trials it was given alongside exercise, such as eccentric calf loading.

Evidence in Hammer Toe

Searched 25 Oct 2026: no trials of lower-leg soft tissue in hammertoe.

Rehabilitation Exercises

Flexor Digitorum Longus Stretch (Towel Under Toes)

StretchingBeginner

Intrinsic Foot Muscle Activation (Short Foot Exercise)

StrengtheningBeginner

Towel Scrunches with Toes (Plantar Foot Flexors)

StrengtheningBeginner

Plantar Fascia Self-Massage with Golf Ball

StretchingBeginner

Toe Spread and Splay (Interosseous Muscle Activation)

Range of MotionBeginner

Marble Pick-Up with Toes (Flexor and Intrinsic Strengthening)

StrengtheningIntermediate

Barefoot Walking on Varied Terrain (Proprioceptive Training)

PosturalIntermediate

Calf and Plantar Fascia Stretch (Downward Dog Position)

StretchingIntermediate

Toe Extension and Flexion Exercises (PIP and MTP Mobility)

Range of MotionIntermediate

Single-Leg Stance on Soft Surface (Proprioceptive and Intrinsic Strengthening)

BalanceIntermediate

Resistance Band Toe Extension and Adduction

StrengtheningAdvanced

Walking Meditation with Foot Awareness (Gait Retraining and Awareness)

PosturalAdvanced

Referral Criteria

  • •Fixed hammer toe deformity causing significant functional impairment or cosmetic distress not improving with conservative management after 8-12 weeks
  • •Severe pain unresponsive to conservative treatment, soft tissue therapy, and appropriate footwear modifications
  • •Signs of vascular insufficiency (cool extremity, color changes, absent pulses) requiring vascular assessment
  • •Evidence of active infection, cellulitis, or non-healing wounds requiring medical or surgical intervention
  • •Signs of diabetic neuropathy or complications requiring specialist endocrinology or podiatry review
  • •Suspicion of underlying inflammatory arthropathy (rheumatoid arthritis, psoriatic arthritis) requiring rheumatology referral
  • •Traumatic injury with suspected fracture, dislocation, or significant structural damage requiring imaging and orthopedic assessment
  • •Failure to progress despite compliant conservative management suggesting need for podiatry or surgical consultation
  • •Development of secondary complications (severe callus, nail deformity, MTP subluxation) requiring specialist foot care