I have had that symptom also and they called it migratory arthritis. My elbow might hurt a couple of days and my foot might hurt next. I used to wonder what I did to it to make it hurt. I just had to rest that spot for a couple days. I also got some relief with CBD oil and I found it works better with THC oil also. Its called the entourage effect. Its drug math 1+1=3. I have used it topical in a salve and it worked good. Also it comes in sublingual that is handy but you must live where its legal. I live in Nevada so everything is legal.
little jerry