Morton’s toe
Morton's toe is the common term for a foot structure where the second toe appears longer than the great toe (the hallux). It is not the toe itself that is longer, but rather the first metatarsal bone, which connects the great toe to the ankle, is congenitally short in relation to the second metatarsal.
This is a very common anatomical variation, present in a significant portion of the general population. In most cases, it is completely harmless and asymptomatic. When it does cause symptoms, such as pain, it is referred to as Morton's syndrome, named after the American orthopedist Dudley J. Morton who first described it as a source of foot problems. This condition is also known as a "Greek foot" or "royal toe," as this foot shape was often idealized in classical Greek sculpture.
The Confusion with "Morton's Disease"
Older medical texts and indexes sometimes contain the erroneous cross-reference "Morton’s toe. See Morton’s disease." This is a source of significant confusion.
- Morton's Toe (Dudley J. Morton): A condition related to bone length (a short first metatarsal).
- Morton's Disease (Thomas G. Morton): An older name for Morton's neuroma, a painful condition involving the thickening of a nerve between the toes (usually the third and fourth).
The two conditions are unrelated, occur in different locations within the foot, and are named after different people.
Biomechanical Effects and Symptoms
While the trait itself is benign, the altered foot structure can change how weight is distributed across the forefoot during walking. Normally, the robust head of the first metatarsal bears a large share of the body's weight during the push-off phase of gait.
In a person with Morton's toe, the short first metatarsal may not bear its proper share of the load. This can cause the weight to be transferred to the head of the second metatarsal. This chronic overloading can lead to a set of symptoms known as Morton's syndrome:
- Metatarsalgia: Pain and tenderness directly beneath the head of the second metatarsal.
- Callus: A thick, often painful callus may form on the sole of the foot under the second metatarsal head due to the excessive pressure.
- Stress Fractures: The second metatarsal becomes more susceptible to stress fractures.
- Referred Pain: The altered gait mechanics can sometimes contribute to pain in the arch, ankles, knees, hips, or lower back.
Management and Treatment
Treatment is not necessary for individuals who do not have symptoms. When Morton's syndrome does develop, management is focused on correcting the faulty foot mechanics and relieving pressure on the second metatarsal.
- Orthotics: The most common treatment is a shoe insert with a flexible pad placed just behind the head of the first metatarsal. This "Morton's extension" helps to lift the first metatarsal, encouraging it to bear more weight.
- Appropriate Footwear: Wearing shoes with a wide and high toe box provides ample room and reduces pressure on the forefoot.
- Physical Therapy: Exercises to strengthen the muscles of the foot can sometimes help improve mechanics.
Surgery is rarely performed but may be considered in severe, persistent cases that do not respond to conservative care.