My 15 Year Old Daughter Plays HS Tennis. She First

My 15 year old daughter plays HS tennis. She first complained of pain in her wrist 3 weeks ago. The trainer gave her ice and she has been taking advil periodically. The trainer said the injury is moving up her arm. They have been wrapping it before she plays and we bought an over the counter brace for her wrist area. Do magnets help? We found an elbow support with magnets and are wondering if this too can help. The tennis season is almost over- about another 2 weeks....