I'm a thirteen year old female, i have noticed these multiple painful red lumps in my left underarm, they sometimes hurt, itch, and ache. When i touch them they hurt, but when I'm don't they either itch or they ache. i have had them for nearly a week, and now I noticed that in my right underarm i have some too, they look like pimples. My mom says its nothing but it really bothers me. What can I do to make them disappear? What is it?