I've been having boils under my arm and groin area since puberty one burst and formed a good size hole and it stunk. now it healed and left pot holes.

Occlusion of: follicles in skin fold areas that become inflamed with exposure to friction / pressure in susceptible persons. With time they discharge pus, are painful and tend to form holes; sinus tract. Obesity, nicotine, hormones, medications, bacteria and genes may increase the risk of this skin disorder. Avoid tight clothes & friction. Daily showers, smoke cessation and weight loss help. Consult dermatology