 [ Symptoms ] why do i have reoccuring pain and swelling in my left nipple  for the past year or so only my left nipple will swell up and become painful and tender to the touch for about a week and then the swelling and pain goes away for about a month and then comes back again but only my left nipple [ Disease ] the long history of pain and bleeding can indicate diverticulitis or celiac disease is the color of the blood bright or black and is it over the stool or embedded inside