I have this reoccuring pain that runs the whole length of the fifth metarsal bone when I try to hit a forehand ( I have a very late backswing and like to drop the wrist at the last instant for topspin.) I've suspected stress fracture, but I don't think so, since sometimes it feels alright. I rather suspect tendonitis in an ulnar tendon which is supposed to attach to a tubercle on that bone, which however I can feel TWO distinct bumps!! Anyone else experience this? Please help. I don't want to keep running around my forehand.