It’s called “hidradenitis suppurativa“ I get them under my arm and on my vag... i’ve Had them since I was about 13, i’ll Be 30 this year! At the age of 17 I underwent surgery to remove the sweat glands from under my arms, in an attempt to get rid of “hidradenitis suppurativa” it helped for awhile but then I began to get boils again in places around the area I had my surgery, as well as on my vag. The boils have a lot to due with sweat which is causing the hair follicles to get infected, and resulting in a painful boil. I used to get teased in school because I would have boils under my arm that would decide to burst, causing blood to run down my under arm and ruin my white shirts, and lets not get started on the pain, there was times I couldn’t even put my arms down because it was to painful. There is no cure for “hidradenitis suppurativa” because it’s not an life or death thing, not enough people have it, or are dealing with it to get a cure. I’ve tried many remedies egg whites, no panties, burst them by hand, surgery, etc... and all I’m left with it the boils and insecurities because my arm pits looks horrible because of an unnecessary surgery my doctor told me would help. I found that a warm towel relieve some of the pain and helps shrink the boils. My only guess as to why you only get them during our periods is because our bodies expands causing us to sweat more, which leads to those hair follicles getting infected which result in boils, but I’m no doctor so don’t quote me on that...