sorry, i actualy just looked at your profile you are 18 correct?, i dont think that it is due to an over the counter supp or anything like that, when i was 16 i had the same occurance, and at that time i was not into strength training, it was a hormone imbalance (test/estro) The first opinion i had was from a dumb fuck doctor who thought it was a boil developing they tried popping it which did not work so he advised me to keep a hot compress to bring the boil to a head and drain it needless to say i went out for a second opinion and found out the truth. DOCTORS DO NOT KNOW EVERYTHING, THEY ARE JUST PEOPLE. QUESTION THE INFORMATION YOU RECIEVE DONT TAKE IT AS THE WORD OF GOD!!!!