About a month ago, for some unknown reason my armpits became very itchy. I dismissed it as maybe just having razor burn or something. Then about a week ago, I noticed a lump in my left armpit and since then a couple more have popped up around it. Then just this morning, I felt a lump on my right armpit. These lumps are very hard and tender, and I know they are not pimples because there are no heads on them and they are not bug bites because there are no openings of the skin anywhere. No skin discoloration either, besides it from being red because I scratch it when it itches. My boyfriend says it is just an infection and it will go away if I stop scratching. I know that a self breast exam for cancer involves the arm pit too, so should I be worried and go see a doctor, or listen to my boyfriend and shrug it off?