A pimple-like growth on the external auditory canal may be caused by boils on the external auditory canal, papules on the external auditory canal, sebaceous cysts and so on. 1. Boils on the external auditory canal: when the patient suffers from boils on the external auditory canal, it will easily lead to purulent inflammatory infection and the phenomenon of pimple-like growth on the external auditory canal, accompanied by severe ear pain. 2. Papules: caused by endogenous or exogenous material deposition such as skin amyloidosis, dust deposition; limited proliferation of epidermal or dermal cellular components, such as psoriasis, common warts, keloid hyperplasia, etc.; caused by limited cellular infiltration of the dermis, such as lichen planus, glossy lichen planus and xanthomatosis. 3. Sebaceous cysts: the exuberant sebaceous glands of the external auditory canal will easily lead to follicle blockage, causing sebaceous cysts, appearing as a pimple on the external auditory canal. Patients with a pimple-like growth in the external auditory canal should immediately go to the hospital to identify the cause of the disease, and actively treated under the guidance of a professional doctor, so as not to delay the condition.