Thumb pain going down forearm

Question

The muscle under your thumb... i think its called the flexor pollicis brevis hurts badly when i try and bend my thumb backwards. It also hurts to touch that part. The pain goes all the way down my forearm on the outer side, I really cant think of anything i have done to it but it is swollen pretty bad, what could this be? Thank you for your time

Answer 1

Sounds like tendinitis. You should have it checked out.

Answer 2

It is either nerve or tendon damage see your doctor for help. it may be fixable with therapy.