Pimples in the ears may be caused by sebaceous cysts, boils in the external auditory canal, eczema in the external auditory canal and other factors. 1. Sebaceous cysts: mainly caused by the blockage of sebaceous gland ducts, sebaceous gland secretions can not be discharged, which will cause pimples in the ear. When the cysts are small, there are usually no clinical symptoms, and the bacterial infection of the cysts may compress the peripheral nerves, which will cause pain and other symptoms. 2. Boils in the external auditory canal: may be related to bacterial infection, when the infection is serious, it may lead to boils in the ear, similar to small pimples, and may be accompanied by itching, redness, tingling and other symptoms. 3. Eczema of the external auditory canal: it may be related to dietary and environmental factors, which may cause red pimples to appear in the ear, similar to pimples, and may be accompanied by severe itching as well as tingling and other symptoms. Pimples in the ear may also be other reasons, it is recommended to go to the regular hospital in time, after a clear diagnosis and standardized treatment.