If cancer is found, then treatment may be done before it spreads further. A local anesthesia may not numb the area quite enough and you may feel some minor discomfort. Also, in rare cases, you may have an allergic reaction to the drug used in this type of anesthesia. Internal bleeding can occur. Infection can occur.
Stitches can become loose or infected.
You should ask your doctor how these risks apply to you. There is any unusual drainage from the surgery area, including bloody drainage. The surgery area becomes red and warm. You develop a fever. You have questions about the procedure or its result.