I am a 16 years old female and i am in good health, for the past year i have changed the deodorant that i use and the soap. About a month ago i noticed a small tender lump under my arm, i though it was because i have changed the soap and the deodorants that i have been using so i stopped using the same soap and it got better, then i put a warm towel on the armpit three times a day for two days and for about three weeks it was gone but now it is back. There are no history of breast cancer from either side of my family but i am worried. What could it be? and what can i do about it?