3 times random wrist pain left only. hurts with use & movement on back of hand side of wrist. what could cause this & what to do w/o paying for appt?

Wrist: If you have no fevers and no swelling in the area or redness the most appropriate thing to do initially would be to take Motrin over-the-counter if you do not have any problems with your kidneys and utilize ice rest and elevation. You can also obtain a wrist splint from your local pharmacy to immobilize the wrist to see if this helps

De quervain syndrome: if your pain is on the thumb side that could be inflammations of thumb tendons called de quervain's syndrome , treatment is by steroid injections and anti inflammatory medication