Why would a birthmark hurt?

A birthmark may hurt if it becomes irritated, inflamed, or if it experiences trauma, such as being scratched or rubbed frequently. Certain types of birthmarks, like hemangiomas, can also be sensitive or painful as they grow or change. Additionally, if a birthmark is located in an area prone to friction or pressure, it may cause discomfort. If pain persists, it's advisable to consult a healthcare professional for further evaluation.