I have been having pain in one breast for a few months on and off but can't feel any lumps and as had this in past in the other breast and been told either muscle or hormonal tried to dismiss it. Last week discomfort returned and nipple really painful to touch this time. I gave my nipple a squeeze yesterday and a lot of creamy matter (very thick like squeezing a white head) came out of one pore. The relief was instant. Breast still feels a little tender but nipple feels fine now. Camping at the moment so can't visit GP for a few days but really worried it's something sinister.