Patient: On my chest and underarm, i have have had bumps under my arm and on my chest. I burst them sometime and it appears to be a blackhead, but they leave the black dark spots. On the other hand, if i laugh to hard or gets nervous or too hot i begin to itch. Whats this sound like? Ive been to the dr and he stated that it looks like hair folliculs growing back in and could have some staff in it…I completed the meds and the itching and random bumps around my nipple and the middle of my chest still appear. Sometime boils appear under my arm but they disappear.