A doc's note sounds legit even though its done out of a lie. But you'd need to know a good friend who happens to be a doc to vouch a "valid" medical note that would excuse you from work for a time.
But what i want to know is how do I hide the scar in the back of the head. Maybe a bandana could do the trick? But in certain work environments, a bandana may not be appropriate. I got no problem exposing a post-op bald scalp. The issue is how to hide that scar. Any suggestions?