Should a muscle be sore after a mole is excised?

I had a mole excised a 9 days ago between my shoulder blade and spine on my back. The stitches have been feeling fine and it has been healing well according to my first follow up. I'm now having some soreness in the area that I think is muscle but I'm not sure. A) Should it still be sore after a week and a half and B) does a mole excision go into the muscle tissue? Thank you!