What is a bump on the foot? In medical terms,
it is a valgus deformity of the first toe, when the first metatarsal bone curves, shifts the big toe and protrudes bone. The consequence is a deviation of the big toe sideways, some "twisting" of the toe is possible, the growth of a "bump" on the foot, the appearance of corns on the plantar surface of the foot near the fifth or first toe, burning pain,...