I have been experiencing excruciating sin in my right nipple for a couple years now.

[Donrita]

I want to know why I have had these pains and why they are coming more often.

[Jack650]

You don't say, but I assume that you are female. I think you should see a good internist right away. He might order mammograms and other tests,

[zouzi]

Hi,
There can be several possibilities that could cause nipple pain. It could be hormonal changes, injury or friction, infection and also if you are on birth control pills. Nipple pain is not a common symptom of breast cancer, but I wouldn’t ignore this problem and urge you to see your doctor for a clinical breast exam. Anytime you notice something odd or unusual in one breast and not in the other it is something to check into.
Best wishes…