A raised bump in the armpit may be lymphadenitis, boils, paronychia, etc. Different treatments are available depending on the cause of the problem, including medication, surgery, and so on. 1. Lymphadenitis: The lymph nodes in the armpit are rich, and bacterial infection can cause lymphadenitis and lymph node enlargement, resulting in a raised bump in the armpit. Anti-inflammatory treatment can be carried out through oral cefaclor, amoxicillin and other antibacterial drugs. 2. Boils: acute suppurative dermatosis of hair follicles and their surrounding tissues, often manifested as subcutaneous swellings, accompanied by redness, swelling, heat and pain and other symptoms. At this time, you can use mupirocin ointment, fusidic acid cream to smear, if the pus has formed abscess, you can also use surgical incision to drain the pus treatment. 3. Associate breasts: some people’s associate breasts can grow to the vicinity of the armpit and form a raised lump in the armpit. Generally there is no need for special treatment, but if the lump is large and affects the aesthetic appearance, surgery can be performed to remove the paratesticular breast. A bulge in the armpit should go to the hospital in time to improve the examination, after a clear diagnosis of timely targeted treatment. Drugs should be used according to the doctor’s instructions.