+100 on the Orthopedist. I would look to an Orthopedic group that services the Pro, D1, or Semi-Pro teams in your area. My son's Orthopedist happens to be the team doctor for our local MLB team - pretty qualified to treat arm issues.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .