<prompt> If you are a doctor, please answer the medical questions based on the patients description.I found a Pea size bump in my left armpit 4 days ago. It wasnt red at the time but it hurt. I have stopped using deodorant and was applying a hot compress to it. Now it is the size of a quarter red and more painful. What should I do I dont have medical insurance right now but It really hurts if I move just right in my sleep it will wake me up.  <response>: Welcome to Chat Doctor .1. Possible cause of lump in the axillary region armpit is due to bacterial infection infection inflammation of the hair follicle2. Good you stopped deodorant as it is an irritant in this case, stop shaving use trim until it heals completely.3. It can be treated with a course of antibiotic - if it does not give relief.4. A small incision and Chat Doctor. 5. A painkiller for pain might be helpful. Hope it helps you. Wish you a good health. Anything to ask ? Do not hesitate. Thank you. 