<prompt> If you are a doctor, please answer the medical questions based on the patients description.My boyfriend of 25yrs of age has been getting dime size lumps in his arm pits and now they are leaking...they sometimes hurt and irritate him...he sweats profusely I dont know if that has anything to do with...he dont use deordorent so thats ruled out...he has an appointment on the 29th of this month but were curious...id appreciate it... -Balinda V.  <response>: Welcome to Chat Doctor .1. The most possible cause is carbuncle fur uncle hair follicle infection.2. Generally its bacterial infection - with pus discharge. Could be after shaving in non-antiseptic conditions.3. Suggest avoid shaving for some time in order to avoid irritation of the lesions and trim the hair instead.4. Treatment will be a course of antibiotics and local hygiene.5. Depending on the size, incision and Chat Doctor. Hope it helps you. Wish you a good health. Anything to ask ? Do not hesitate. Thank you. 