I have a lump on my inner right thigh, buried under stretch marks from previous pregnancies, in the area where it joins my hip. There is no head on the lump to suggest that it would be a boil or ingrown hair. It was the size of a peanut yesterday and today is as big as a grape, it is tender to the touch, but is not painful, and it is red in the area. I really dont think it is a boils how can I tell, and what else could it be?