I’ve had five trigger fingers that eventually led to release surgeries, one was for the right thumb.
Try to rest it, use a little ice to settle down the inflammation at the “pulley”. If it doesn’t go away the first thing they’ll normally try is a steroid injection into the pulley. Even with a local it SMARTS 😬 but that usually helps for a while. After two or three, a surgical release is the next step but that’s a piece of cake.
Dr. Howard offered me injections. Told him, "No way!"
Though the shots may reduce the discomfort, IT WILL RETURN!
I chose to do the surgery! Once and done!