My problem was more with left hand on piano but affects my violin playing, too. Finally realized what I was doing that aggravated it and working to avoid falling back to bad habits that then cause flare ups. My teacher was not able to spot the problem, but I figured it out through some finger exercises. At first I thought it might just be over practicing. No lasting improvement happened even with resting it, until the cause was found.
I know someone who has had tendinitis in the left wrist. I think it’s a common injury for violinists. He wore a brace when he wasn’t playing and went to therapy for it. While it is great that you have found a better way of playing to lessen your pain, you should probably still seek the advice from a therapist/physician.