I have a ring of itchy bumps around my groin area and the skin on the inside of the perimeter on both sides of my groin have a brownish or darker discoloration, only the ring if bumps and sores have a definite itch. Also the discolored skin often changed from dry skin top a smooth to the touch skin.the ring also seems to be expanding outward onto my thighs and waking it hasn't helped. Was wondering what this might be, any answers?