Hi 3 years on from a mastectomy and a metastatic cancer diagnosis (in my bones) I’m experiencing pain and soreness under my arm, in the chest wall and around the surgery site which seems to be related...
I had a mastectomy eleven years ago, very occasionally I get a scar tissue twinge. A good stretch usually fixes it. So from my experience it’s not a usual thing to experience from a mastectomy. But from metastatic cancer? Sorry, I can’t advise. I assume you have discussed this with your oncologist?