Breast pain does not occur but the nipple appears painful when pressed. This condition is commonly seen clinically in the following ways: In the first case, it may be caused by simple breast enlargement. Very rarely, patients may experience nipple pain, which is aggravated when pressed. In the second case, some inflammation within the nipple of some breasts can cause nipple inflammation. This condition can present with red, swollen and painful nipples, and swelling and pain that is very pronounced when pressure is applied. The third condition is the more common clinical nipple cracking disease, this situation in the nipple surface to form some small rupture, long time does not heal, easy to cause infection, which are some of the causes of nipple pain. The actual fact is that you can find out the exact cause of the problem by going to a regular hospital for a detailed examination and diagnosis.