Four days ago I began experiencing extreme pain in the left side of my left breast. Starting out in the breast tissue beneath my arm and reaching to the nipple area. It feels much like a pulsing, yet bruised pain and doesn't get any better with ice, heat, or pills and I've tried a few different types of pain killers and muscle relaxants. It also feels to be right in the breast tissue, not the skin and I really don't think it's a pulled muscle or growing pains. The pain is bad enough to limit my activities and keep me awake through the night, sometimes in tears. The area is also hot to the touch. I will be seventeen years old this week and I have no idea what this could be?