Just had appointment with my surgical oncologist, I also have sharp pain in two areas of the lumpectomy, which was done in August of 2022. She tells me can have injection to stop pain or take inflammatory meds. Allergic to anything with aspirin. I do not want injection at this time. She said to take 500 mg. Tylenol three times a day. If it does not help I may have to get injection. Hope this helps in some way. Also stopped Letrosole, too may side effects.