I performed cat scans & mammograms for over 10 years and I can tell you that cysts are for the most part benign. Caffiene can irritate cysts and in turn they fill with fluid causing pressure & discomfort. Everyone gets them, but cutting down on caffeine will help. They used to say that if it hurts then it isn't cancer, but now there are a few types of breast cancer that do cause pain, however they usually come with other syptoms as well such as hardening of the breast, orange peel appearance, or redness & swelling. I have had a blocked sweat gland in my armpit & it hurt to move my arm. I soaked in a hot bath and massaged the area. Next day, area was obvious and I lanced it with a sterile pin. My powdered deoderant had built up & blocked it. I switched to gel kind after that. As for DO vs. MD's well MD's told me that the DO programs are cheaper & easier, DO's tell me that their study is more for body structure & movement. Most DO's will do adjustments to help your gait or balance kinda similar to a chiropractor. They tend to know more about bones, muscles, & joints etc.... I hope this helps you a little bit.