Claw Toe

Lower Limb

Overview

Claw toe is a progressive flexion deformity of the interphalangeal joints with dorsal subluxation of the metatarsophalangeal joint, most commonly affecting the second through fifth toes. The condition results from intrinsic muscle weakness, extrinsic muscle imbalance, or structural abnormalities in the foot. It can cause significant functional impairment, pain, and difficulty with footwear.

Pathophysiology

Claw toe develops when there is an imbalance between intrinsic foot muscles (interossei and lumbricals) and extrinsic muscles (flexor and extensor digitorum). Intrinsic muscle weakness allows unopposed action of the extrinsic flexors, causing flexion of the distal interphalangeal joint and plantarflexion of the proximal interphalangeal joint. The metatarsophalangeal joint hyperextends secondarily, creating dorsal prominence. Common causes include: neurological conditions (stroke, Charcot-Marie-Tooth disease, spinal cord injury), inflammatory arthropathies (rheumatoid arthritis), chronic compartment syndrome, prolonged immobilization, or idiopathic intrinsic muscle atrophy. Repetitive pressure from footwear exacerbates the deformity.

Patient Education

Claw toe often progresses gradually, but early intervention with footwear modification, intrinsic muscle strengthening, and stretching can prevent fixed deformity and reduce pain; surgical intervention may be necessary if conservative management fails.

Typical Presentation

Site

Second through fifth toes, most commonly the second toe; dorsal aspects of proximal interphalangeal joints and plantar aspects of metatarsal heads

Quality

Aching, sharp pain at pressure points; burning sensation; numbness in severe cases

Intensity

Mild to moderate pain that worsens with prolonged standing or walking; pain 3-7/10 depending on severity

Aggravating

Tight or constrictive footwear; prolonged standing or walking; weight-bearing activities; pressure on dorsal prominences

Relieving

Rest and elevation; removal of constrictive footwear; padding or orthotics; anti-inflammatory medications; ice application

Associated

Calluses and corns on dorsal proximal interphalangeal joints and plantar metatarsal heads; hammertoe appearance; metatarsalgia; difficulty walking; functional foot pain; visible dorsal toe prominence; reduced toe mobility; associated forefoot pain

Orthopaedic Tests

Claw Toe Deformity Assessment (Visual/Positional)

Procedure

Observe the foot at rest and during weight-bearing. Assess for hyperextension of the metatarsophalangeal (MTP) joint combined with flexion of the proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints. Compare bilateral feet.

Positive Finding

Characteristic claw-like appearance with MTP extension and IP joint flexion; may be flexible or fixed depending on chronicity

Sensitivity / Specificity

Unknown / Unknown

Interpretation

Confirms anatomical deformity; severity and rigidity help determine conservative versus surgical management options. Fixed deformities suggest chronic nerve involvement or muscle imbalance.

Prone Knee Bend (Lumbar Nerve Root Tension Test L4-L5)

Procedure

Patient lies prone; examiner flexes the knee to bring the heel toward the buttock while monitoring for radiating pain into the foot. Assess for pain reproduction and compare bilateral sides.

Positive Finding

Reproduction of pain radiating into the foot/toes, particularly associated with lower lumbar or upper sacral nerve root compromise causing intrinsic foot muscle weakness

Sensitivity / Specificity

Unknown / Unknown

Interpretation

Positive result suggests L4 or L5 nerve root irritation as a cause of intrinsic muscle paresis; helps differentiate neurogenic claw toe from local structural deformity

Intrinsic Muscle Strength Testing (Lumbrical/Interossei Function)

Procedure

Patient seated or supine; stabilize the MTP joint in neutral extension while asking patient to flex the PIP and DIP joints. Alternatively, assess ability to perform the 'short foot' exercise (medial arch dome without toe flexion). Grade strength 0–5.

Positive Finding

Weakness or inability to flex IP joints independently, or inability to perform short foot exercise; graded strength less than 4/5

Sensitivity / Specificity

Unknown / Unknown

Interpretation

Confirms intrinsic muscle weakness as the primary mechanism; indicates neurogenic etiology (e.g., S1 radiculopathy, tarsal tunnel syndrome, or motor neuropathy) versus extrinsic muscle tightness

Passive Corrective Test (Flexibility Assessment)

Procedure

With patient supine or seated, passively extend the PIP and DIP joints while keeping the MTP joint in neutral. Note ease of correction and whether deformity is flexible or rigid.

Positive Finding

Inability to passively straighten the IP joints; rigid, fixed deformity that cannot be corrected

Sensitivity / Specificity

Unknown / Unknown

Interpretation

Flexible deformity suggests functional muscle imbalance amenable to conservative therapy; rigid deformity indicates structural contracture requiring surgical intervention

Tinel's Sign (Tarsal Tunnel Syndrome Screening)

Procedure

Percuss along the posterior tibial nerve behind the medial malleolus. Assess for radiation of tingling or paresthesia into the plantar foot and toes.

Positive Finding

Reproduction of tingling, numbness, or electric sensation in the plantar foot or toes distal to the percussion site

Sensitivity / Specificity

40–68% / 89–95%

Mondelli et al., 2005, Electroencephalography and Clinical Neurophysiology

Interpretation

Positive result suggests tarsal tunnel syndrome as an underlying cause of intrinsic muscle denervation leading to claw toe deformity; high specificity supports diagnosis when positive

Silfverskiöld Test (Gastrocnemius-Soleus Tightness)

Procedure

Patient supine; knee extended then flexed to 90°. Dorsiflex the ankle with the foot inverted (short foot). Compare dorsiflexion range with knee extended versus flexed.

Positive Finding

Reduced ankle dorsiflexion with knee extended but improved dorsiflexion with knee flexed, indicating isolated gastrocnemius tightness

Sensitivity / Specificity

Unknown / Unknown

Interpretation

Identifies extrinsic muscle tightness (plantarflexor contracture) contributing to claw toe deformity; guides need for stretching, night splinting, or percutaneous tenotomy

⚠ Red Flags

  • •Signs of vascular compromise (colour changes, coolness, absent pulses)
  • •Evidence of diabetic foot ulceration or infection
  • •Severe neurological deficit with progressive weakness
  • •Acute trauma with severe deformity or fracture
  • •Signs of complex regional pain syndrome
  • •Unexplained systemic symptoms suggesting underlying systemic disease

⚡ Yellow Flags

  • •High fear-avoidance beliefs regarding foot pain and activity
  • •Catastrophising about surgical necessity
  • •Significant functional disability disproportionate to structural findings
  • •Occupational demands requiring prolonged standing or specific footwear
  • •Body image concerns related to visible toe deformity
  • •Resistance to conservative management due to unrealistic expectations
  • •Depression or anxiety related to chronic pain and functional limitations

Osteopathic Techniques

Region

Intrinsic foot muscles (interossei and lumbricals)

Technique

Soft Tissue

Rationale

Soft tissue release of intrinsic muscles restores normal muscle balance, improves proprioception, and reduces the tension contributing to deformity progression. Direct manipulation enhances blood flow and tissue healing.

Region

Metatarsophalangeal joints of affected toes

Technique

Articulation

Rationale

Gentle articulation restores normal joint mechanics, maintains capsular flexibility, and prevents compensatory restrictions in adjacent joints. This maintains functional range and reduces pain with movement.

Region

Plantar fascia and flexor digitorum brevis

Technique

Soft Tissue

Rationale

Releases fascial tension and addresses secondary shortening of plantar flexor structures, reducing plantarflexion forces and helping restore neutral toe positioning.

Region

Ankle and subtalar joints

Technique

Articulation

Rationale

Restores proximal foot mechanics and ankle dorsiflexion, which supports intrinsic muscle function and reduces compensatory toe flexion during walking.

Region

Calf muscles (gastrocnemius and soleus)

Technique

MET

Rationale

Muscle energy techniques release calf tightness that restricts ankle dorsiflexion, reducing compensatory plantarflexion and toe flexion patterns during gait.

Region

Dorsal foot tissues and extensor tendons

Technique

Soft Tissue

Rationale

Addresses adhesions and tension in dorsal structures that may restrict metatarsophalangeal plantarflexion and perpetuate the hyperextension deformity.

Add-On Approaches

Chinese Medicine

TCM addresses underlying Liver Qi stagnation and Kidney Yang deficiency contributing to muscle weakness and poor circulation. Acupuncture points: LV3 (Tai Chong), KI3 (Tai Xi), ST36 (Zu San Li), and local points on the dorsum of the foot improve circulation and tonify deficient patterns.

Chiropractic

Chiropractic care focuses on metatarsophalangeal and interphalangeal joint mobilisation and manipulation to restore normal joint mechanics, coupled with assessment of ankle and knee alignment affecting foot biomechanics.

Physiotherapy

Physiotherapy emphasises progressive intrinsic foot muscle strengthening using short foot exercises, towel scrunching, and marble picking; dorsiflexion and toe extension strengthening; and gait retraining to reduce flexor dominance.

Remedial Massage

Deep tissue massage addresses myofascial restrictions in plantar intrinsic muscles, calf musculature, and anterior shin compartment to restore normal muscle balance and reduce pain at pressure points.

Rehabilitation Exercises

Short Foot Exercise (Intrinsic Muscle Activation)

StrengtheningBeginner

Towel Scrunching with Toes

StrengtheningBeginner

Marble or Coin Picking with Toes

StrengtheningBeginner

Toe Extension and Flexion Active Range of Motion

Range of MotionBeginner

Plantar Fascia and Toe Flexor Stretch

StretchingBeginner

Calf Muscle Stretch (Gastrocnemius and Soleus)

StretchingBeginner

Toe Extension Resistance with Resistance Band

StrengtheningIntermediate

Gait Training with Toe Extension Focus

PosturalIntermediate

Single-Leg Balance with Intrinsic Foot Muscle Engagement

BalanceIntermediate

Seated Toe Flexor Stretching with Manual Assistance

StrengtheningIntermediate

Metatarsophalangeal Joint Mobilisation with Hand

Range of MotionAdvanced

Barefoot Standing and Walking on Varied Surfaces

BalanceAdvanced

Referral Criteria

  • •Fixed deformity unresponsive to conservative management after 12 weeks of consistent treatment and exercise
  • •Severe functional impairment affecting activities of daily living and quality of life
  • •Development of skin breakdown, ulceration, or signs of infection requiring podiatric or surgical assessment
  • •Underlying systemic disease (rheumatoid arthritis, diabetes, neurological condition) requiring specialist medical management
  • •Presence of neurovascular compromise suggesting vascular insufficiency
  • •Suspected associated fracture, significant joint damage, or osteoarthritis requiring imaging and specialist assessment
  • •Failed conservative management with consideration for surgical correction (podiatric surgery)
  • •Progressive neurological deficit suggesting spinal cord pathology or serious neurological disease