Shaking arm

After pitching my arm won’t stop shaking and is in a lot of pain. It throbs for a good hour after pitching. Any help?

Is this the first time this has happened?
If it continues to hurt, I would consult a medical professional.

I would say that you are tweaking the Ulnar Nerve or another nerve in your arm, either way this isn’t something to mess about with you should really get it looked at by a Dr.