Is there any promising research being done for trigger finger treatment?

Yes and No: Surgery is the truly option with the best success rate. Steroid injections help but are temporary, weaken the joint and tissue and bone, and become less effective over time. Discuss the best options, even occupational hand therapy, with your hand surgeon.

Always: Research is ongoing but no "breakthrough" findings or cures other than rest, minimizing inflammation and swelling and surgical release at the present time.