tennis toe

An uncommon condition affecting the great toe, characterised by a subungual hematoma, which may follow any vigorous exercise—e.g., tennis-in shoes with hardened toe protectors

tennis toe

Bleeding beneath the toenail resulting from repeated friction with the inside of the shoe. It produces a dark blue or black discoloration of the nail. It is a common problem of athletes who participate in sports that involve repetitive running, jumping, stopping, and starting.

See also: toe