what is this growing substance?

I scratch or pick at areas and often a tiny bit of puss may come out if it acne or sometimes it may just be a tiny bump that itches and I. Will scratch it away but it will grow back larger. With no pore to escape out from due the scratched area now becoming scar tissue the mass continues to grow under my skin and I can't ignore it and pick it out. The cycle continues. And the problem area from the picking grows larger and becomes a dime size patch area that I pick but the ugly cyle continues. Accutanne and antibiotics don't even destroy these problem areas. I know I need to stop picking in the first place but another major issue is getting rid of these problem areas.