Ive recently been having problems for the past year. I keep getting these lumps. I usually get them on my stomach or outer thigh. They get up to 1/2 inch wide, 1 inch long, and 1/4 inch thick. And appearing smaller under breast and arm. Its dark purple in the center and gradually fading to a light pink. I can sometimes pop it like a pimple but get a reddish pus and they leave a dark purple scar when they go away after a couple months. They feel hard and painful to the touch. I thought it was just a boil or something like that but its recurring and sometimes they come back up in same place and other times they come up somewhere else on my stomach usually. Can anyone give me advice on what it could be? Ive searched many sites to see if I can find a picture to compare it to but no such luck.