Hi there. As a way of background I am 28 years old and have PCOS. Recently I have felt pain in the right handside (outside) of my breast when moving my right arm. There is large bumps in my breast but I have been scanned etc a couple of years ago and I'm not sure whether it's thickening tissue as a result of hormones etc. the pain feels like bruising/tenderness. Any idea what it is? Thank you in advance.