Bumps on both sides of the ear may be related to folliculitis, lymphadenitis and other causes. 1. Folliculitis: due to the inflammatory reaction caused by bacterial infection of the skin follicles on both sides of the ear and the surrounding area, the phenomenon of bumps on both sides of the ear may occur. 2. Lymphadenitis: due to inflammation in the drainage area of the lymph nodes in the ear, the lymph nodes behind the ear may become enlarged, which may be manifested as bumps on both sides of the ear. It is recommended that people with bumps on both sides of the ear go to the hospital in time to clarify the cause of the disease and carry out standardized treatment under the guidance of the doctor, so as to avoid delaying the condition.