I broke out with a rash underneath my armpits a few weeks ago. They were small red bumps that are itchy, have puss and spread quickly. Doing research, I thought it might me an allergic reaction to a diet pill I started taking the week before. I stopped taking them just incase... I also treated them with a body acne shower gel and an anti fungal cream. It seemed to help and cleared up a little, other than now having raw and dry armpits. A few days ago, I noticed that the small red bumps have returned, not only in my arm pits, but a couple on my back, my legs and my forearms. Do you think I need an antibiotic? Thank you for your help!