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.
Welcome to Chat Doctor .1. Possible cause of lump in the axillary region / armpit is due to bacterial infection (infection / inflammation of the hair follicle)2. 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.