Buns in the ear that hurt when touched can be caused by boils on the external auditory canal, sebaceous cysts with infection, and cholesteatoma of the external auditory canal. 1. Boils on the external auditory canal: Boils on the external auditory canal are caused by Staphylococcus aureus infections, which may cause ear pain, boils, and other symptoms, and localized elevation may cause pain when touching the bag in the ear. 2. Sebaceous cysts with infection: Sebaceous cysts are caused by the blockage of the sebaceous glands of the hair follicles, the main symptom of the patient is a rice-like or egg-sized cysts, and when the cysts are infected, it can cause the phenomenon of pain when touching the bag growing in the ear. 3. Cholesteatoma of the external auditory canal: the cause of cholesteatoma of the external auditory canal is still unclear, and it is considered to be caused by long-term stimulation of inflammation or inflammation and other factors. The main symptoms of patients are ear canal blockage, chronic ear pain, cholesteatoma, etc., and there will be the symptom of pain when touching a bag growing in the ear. Patients with symptoms of a bag growing in the ear that hurts when touched should seek timely medical attention to identify the cause of the disease and target treatment.