My wrist pain keeps getting better and then worsening again. Why is this happening?

I've had pain in my wrist from time to time, and it was fine, but sometimes the pain got so bad that I couldn't even drive. Could this be because of a ligament sprain I had in the past?

I get pain injections every time it gets bad, but the effect only lasts for a short time. It really hurts so much that I scream sometimes. I'm worried that it'll last my whole life.