When I was young, I had a boil under my armpit,I was given drugs so it healed but a peanut size remained. Now am 26 and I noticed that when am about to mensurate its enlarges so I can feel it and when am done it is nearly vanished.I've seen doctors but they just gave me antibiotics that didn't work. and now he says my body has simply adopted the trend of event. Should I Be worried or rely on my doctors advise