My trigger finger has been Cured, thank be to God. I was three weeks from my scheduled operation when I started a routine of hanging from a monkey bars, if I recall right I instantly had a result the first day. One week in the rooting I cancelled the operation and two months later more or less I'm cured.
This is what the therapy that I recommend:
Hang from a monkey bar or any alternative structure that you can roll your finger around a bar that lifts you from the floor. Hang from the bar for 10 seconds and release repeat this 10 times, do this exercise daily.