When nipple pain occurs after intercourse, it is most likely due to sexual touching during intercourse, thus creating irritation to the nipple. There are many reasons for nipple pain, including breast enlargement, inflammation of the breast, or external irritation. Depending on the symptoms, appropriate differentiation is needed. In the absence of any external stimulation, nipple pain needs to be properly observed. It is necessary to understand whether there is a possibility of inflammatory infection, and it is also necessary to observe whether there are any obvious abnormal changes in the breast, which can be treated by medication. If the pain occurs for a short time after intercourse, the symptoms can gradually disappear and return to normal with the passage of time. However, if it lasts too long, you need to go to the hospital for a mammogram to find out if there is a possibility of trauma or infection.