Numbness on scalp following Mohs surgery making me feel nauseous. Is this normal?

You will have postop swelling and it will take time for everything to settle. Things will improve and these symptoms are normal. I would keep in contact with your PS but it sounds like everything is progressing appropriately.

It isn't uncommon to have a numb spot on the skin after Mohs surgery, especially on the scalp. During the procedure, the Mohs surgeon has to cut through the skin in order to take a layer and remove the tumor. When you cut through the skin, the surgeon may also cut through the tiny nerves in the area that innervate the surrounding skin. This numbness can persist for some time and resolves slowly after the surgery. However, your other symptoms could be indicative of another problem, such as an infection. This can be seen even at 1 week post-op. I recommend you contact your surgeon and ensure you are not having any other complication after surgery.