Hello Naomi- I had each finger in turn go as trigger fingers and this was well before I got diagnosed with RA. the steroid injections didn't do it for me and I subsequently had very successful operations on each one with no return of the symptoms.
I also made a home made splint to wear on my finger at night to keep it straight because that was when it used to bend inwards and it was so painful to try and uncurl it in the mornings.
YES I'VE CHANGED, PAIN DOES THAT TO PEOPLE.