Sore middle finger right hand tendon seems to catch?

Finger pain.: This could be the beginning of dupuytren's contracture which is related to contraction of the tendon. See your doctor if it does not resolve.

Trigger finger: This is probably a trigger finger. A hand surgeon can help you with a cortisone injection.

Trigger finger: Trigger finger is very common. Night- time bracing, anti-inflammatories are a good place to start with treatment. Steroid injections and surgery are reserved for recalcitrant cases.