<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hello. I am 19 years old, 55, and 200 pounds. in case you need to know... I have a small lump underneath my armpit. When I fist found out about it, it sort of hurt, but now its just there. I went to see a docter and they said to use a clean razor when shaving and if it doesnt dissapear, to see them again. Just recently though, I pooped blood. by recent, I mean 2 hours ago...  <response>: Hi, dairy have gone through your question. I can understand your concern. You may have ingrowing hair or infection of hair follicles or some other lesion. You should go for examination. If needed to take a course of antibiotics or go for biopsy according diagnosis. Consult your doctor and take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. 