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Hammer Toe Deformities

Lesser toe deformity with flexed PIP joint, flexible or fixed

Lesser toe

Overview

The Science of Hammer Toe Deformities

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A hammer toe develops when the small inside your foot lose the tug of war against the longer tendons that run down from the leg. The intrinsics normally bend the toe at the joint where it meets the foot while keeping the smaller joints beyond it straight. When they can no longer do that, the toe buckles: it lifts at the base and bends at the middle joint.

Early on the deformity is flexible and the toe can still be straightened by hand. Over time the joint capsule, the small beneath the joint and the surrounding soft tissue adapt to the shortened position, and the deformity becomes fixed. That distinction matters, because a flexible toe responds to load management, footwear change and targeted exercise in a way a rigid one does not.

Symptoms usually come from friction and pressure rather than the deformity itself. The raised middle joint rubs against the top of the shoe and forms a corn, while the toe tip and the ball of the foot beneath the base of the toe take more pressure than they were designed for.

Overview

Contributing Factors

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Footwear is the most common contributor. A narrow toe box squeezes the toes together, and any heel height shifts your weight forward onto the front of the foot, which increases the demand on the toes to grip. Both encourage the buckled position.

Foot structure plays a part too. A second toe that is longer than the big toe, a high arch that concentrates load on the ball of the foot, and a bunion that crowds the neighbouring toes all raise the risk. So does anything that weakens the or alters the nerve supply to the foot.

Because the toes are working harder to stabilise you than most people realise, deformity often reflects a foot that has been compensating for a long time. Assessment therefore looks beyond the toe itself to how you load the , what your footwear allows, and whether the deformity is still flexible.

Conditions I commonly see alongside, or confused with, this one.

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