So I've had nearly every common ache and pain associated with Tennis at one time or another. However, I now have a horrible pain in my hand between the second and third metacarpal (counting the thumb metacarpal as "one"). The pain happens mostly when my wrist is laid back, as in hitting forehands, or during the upward snap from the trophy position serving. It actually hurts the most during the serve. First of all, what the hell could I have done? Second, have any of you had this or something similar happen? It feels a bit like it could be tendonitis, in that it gets bearable when the hand has become loose from warm-up. I am resting, icing, NSAID-in, etc. but am wondering if there might be cause for worry other than standard.