helo, i have been getting small spots under my arms for the past 3-4 years, and iv used many different cremes, e.g Fucibet cream, e45,Daktacort,sudocrem and some tablets too, but the past week i have had a small lump under my armpit again, sometimes it hurts to touch and sometimes it doesnt, but i have put more cream on and it started to sting me, what could it be?