Are Tailor’s Bunions Hereditary? Causes and Prevention

A Tailor’s Bunion, also known as a bunionette, is a bony prominence that forms on the lateral, or outer, side of the foot at the base of the smallest toe. This condition involves an enlargement of the fifth metatarsal head. The name originated centuries ago from tailors who often sat cross-legged, causing consistent friction and pressure on the outside edge of their feet, which led to the development of the characteristic bony bump.

What Exactly Is a Tailor’s Bunion

A Tailor’s Bunion develops at the fifth metatarsophalangeal (MTP) joint, the connection point between the fifth metatarsal bone and the first bone of the pinky toe. The underlying issue is a gradual misalignment where the fifth metatarsal bone shifts outward while the small toe drifts inward. This displacement creates a visible, painful enlargement on the side of the foot.

The bony protrusion often leads to several common physical symptoms. Individuals typically experience pain and tenderness localized around the joint, especially when wearing restrictive or tapered shoes. The area can become inflamed, presenting with swelling and redness due to constant rubbing against footwear, which may also lead to the formation of calluses or corns over the prominence.

The Role of Genetics and Inherited Foot Structure

The bony enlargement itself is not directly passed down through generations, but the structural mechanics that predispose a person to developing one are inherited. An individual can inherit a specific foot architecture that creates instability and abnormal pressure, making the development of a Tailor’s Bunion highly likely. This structural predisposition is often the primary cause.

One common inherited structural variation is an increased angle between the fourth and fifth metatarsal bones, known as an increased intermetatarsal angle. When this angle is wider than average, it causes the head of the fifth metatarsal to project further outward. Another inherited anatomical feature involves the shape or length of the fifth metatarsal, where the bone may be naturally enlarged or have a rounded, “dumbbell” shape at the head.

Structural issues can also involve a fifth metatarsal bone that is abnormally long or one that is naturally positioned lower, or more plantarflexed, than the other metatarsals. These variations in bone structure and alignment disrupt the foot’s normal biomechanics. The resulting instability causes the foot to spread excessively, forcing the fifth metatarsal head laterally and making it susceptible to pressure.

External Triggers and Environmental Factors

While inherited foot structure creates the susceptibility, external factors often serve as triggers that accelerate the deformity’s progression or cause symptoms to appear. Footwear is the most significant environmental influence, particularly shoes that compress the forefoot. Narrow toe boxes squeeze the toes together, continually forcing the pinky toe inward and the fifth metatarsal head outward.

High-heeled shoes also exacerbate the condition by shifting body weight forward and increasing pressure on the forefoot, intensifying stress on the fifth MTP joint. Any shoe that lacks adequate width or taper in the toe area will increase friction and irritation against the bony prominence. This constant mechanical irritation causes inflammation and pain.

Certain activities or occupations that involve repetitive pressure on the outside of the foot can also be contributing factors. Activities requiring prolonged kneeling or sitting with the legs crossed, such as the historical practice of tailors, place direct, persistent force on the prominent bone. This sustained pressure aggravates the joint capsule and surrounding soft tissues, further encouraging the development of the bunionette.

Strategies for Prevention and Conservative Care

The most effective strategy for managing and preventing the progression of a Tailor’s Bunion involves modifying footwear. Choosing shoes with a wide, deep toe box is paramount, as this allows the toes to spread naturally and eliminates pressure on the lateral side of the foot. Materials like soft leather or mesh are preferable because they conform better to the foot’s shape and reduce friction.

Using protective padding, such as silicone bunion pads or felt cushions, can help create a buffer between the prominence and the shoe, reducing irritation and pain. Over-the-counter or custom orthotic inserts may also be used to correct faulty foot mechanics, such as excessive pronation, which contributes to the spreading of the forefoot. These inserts help redistribute pressure away from the fifth metatarsal head.

Specific exercises can strengthen the intrinsic foot muscles and improve alignment. One beneficial technique is the pinky toe abduction exercise, which involves consciously moving the small toe away from the fourth toe to strengthen the abductor digiti minimi muscle. Another exercise involves placing a small towel on the floor and scrunching it toward the heel using only the toes, which helps build overall foot strength. If conservative measures fail to provide relief and the pain significantly impacts daily function, consultation with a podiatrist is necessary.