Sudden painful inverted nipple during intimacy: should we worry?

During intimacy, I noticed that my girlfriend's nipple had become inverted, and when I touched it she said it was painful. We were concerned enough that we went to the hospital around 5 a. m.

I know breast cancer is one possible cause, but are there other conditions that can also cause a painful inverted nipple? Has anyone experienced something similar?😕

Sudden painful inverted nipple during intimacy: should we worry?
Post Opinion