Lumps on the ear are usually mainly due to sebaceous cysts, ear or keloid, etc. They should be consulted promptly and diagnosed clearly after detailed examination. 1. If the sebaceous gland ducts somewhere in the skin around the ear are blocked, it will cause sebum retention to form sebaceous cysts, and if it suffers from infection, it will also cause redness, swelling, heat, pain and other related symptoms, and if the cysts are relatively large, it will also affect the aesthetics or physiological function. 2. Keloid: Keloid is mostly caused by fibrous connective tissue proliferation due to ear piercing or other traumatic injuries. Lumps can be felt when touched. If you find a lump on your ear, you should actively seek medical treatment and get a clear diagnosis after systematic examination.