There is a bag on the side of the ear that hurts when you press it. Consider sebaceous cysts secondary infection or local lymphadenitis, etc. You need to clarify the cause of the disease and treat the symptoms. 1. Sebaceous cysts secondary infection: due to sebaceous gland duct blockage, sebum gradually stagnate into cysts. When sebaceous cysts secondary bacterial infection, there may be local pain, redness, swelling and even pus. Sebaceous cysts can be surgically removed, and antibacterial treatment such as oral amoxicillin should be given in time after the cysts are infected by bacteria. 2. lymphadenitis: when the ear acute inflammation such as acute otitis externa, acute otitis media, etc., can lead to ear lymph node enlargement, resulting in the ear side of the long a bag when pressed on the pain. Oral penicillin, cephalosporin and macrolide antibiotics, such as amoxicillin clavulanate potassium, cefuroxime, roxithromycin and other drugs for treatment. There is a bag growing on the side of the ear that hurts when pressed, it is recommended that the hospital visit, diagnosis and clear treatment.