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Sometimes a muscle imbalance causes a hammertoe, or a bending of the toe at the first joint. The bent toe looks like an upside-down “V”. The abnormal imbalance of muscles increases the pressure on the toe’s joints and tendons.
A flexible hammertoe is still moveable at the joint and can be treated, but a rigid hammertoe may become immobile.
Trauma such as from an injury can cause a hammertoe, as can heredity, arthritis, and wearing shoes that are too tight.