A nose piercing bump can be caused by a keloid, a granuloma, tissue damage, and more. An allergy to the metal in your piercing, especially nickel or cobalt, can also cause a bump. A granuloma will ...

"Not cleaning the area around a piercing can increase risk of irritation, infection, granuloma formation and scarring," explains Dr. King. If your piercing does get infected, "most physicians will ...