I've been dealing with soreness in one of my nipples for a few days now, and its really uncomfortable when I touch it. A few months back, I had some discharge from the same nipple and underwent an ultrasound and several blood tests, but everything came back negative. Ive been on birth control pills for about 7 years. Any ideas on why I might be experiencing this pain, even though there's no discharge or other issues right now?

there might be some hormonal changes so you are getting pain. apply primrose oil every night for 1 month it will reduce your pain