What is cauliflower ear?

Cauliflower ear is a deformed ear common in wrestlers, BJJ, and MMA. Blunt trauma or repeated friction separates the skin from the ear cartilage and blood pools in that space (a hematoma). If the blood is not drained and compressed early, it hardens into scar tissue and the ear looks lumpy, like a cauliflower. Common causes on the mats: grinding during takedowns, head pressure in triangles, guillotines, head-and-arm chokes, and friction against the mat. Genetics and ear shape matter: some people get it fast; others train for years without it. Once fully set, it is largely permanent without cosmetic surgery. Spanish searches (“oreja de coliflor,” “orejas de coliflor”) are the same injury. Many grapplers treat it as a badge of honor; others protect their ears from day one. Prevention and early treatment matter more than myths: see the companion article on preventing cauliflower ear for headgear and what to do when an ear swells.