Hi, i had a ball day at school a couple of days ago. at the end of the basketball game, i got a pass that hit one nipple. do not feel general pain, but is a little swollen, may feel a little pain with weak touch and worse with harder. any tips?

I suspect that you had some bleeding under the nipple (hematoma). Ice is usually helpful in the first 48-72 hours but of little benefit after that. At this point you just need to wait for the hematoma to resolve. I expect it to be completely resolved within 3 weeks.

I would allow several days or more for such a contusion of the breast to heal. Cold applications are more helpful for the first 48 hours and then switching to heat may hasten healing or lessen tenderness. Anti-inflammatory medication like ibuprofen or naproxen may relieve pain and inflammation.