There are roughly two causes of pimples inside the ear: first, boils inside the ear, mostly related to the blockage of hair follicles with sebaceous cysts or membranous cystitis, which is a clinical condition caused by bacterial infection after the blockage of hair follicles, and the need to keep the ear dry as well as tidy. The surface of the pimple can be disinfected with alcohol cotton balls, followed by the application of Bactrim ointment, or the pus can be cut open and drained, and the medication can be changed daily. If the pimples are caused by eczema in the external ear canal and look like many small pimples, anti-allergic treatment is needed at this time. At the same time, keep the inner ear dry, do not dig and scratch, and also apply corticosteroids as appropriate.