Mine had gymnast wrist -- stress fractures in her wrists -- when she was 9 turning 10 and training level 7. She pushed through mild pain through most of the season without letting on, and we were all surprised at the fact she had fractures as the doc only sent her for x-rays to get a baseline since it had been hurting for a long time and in case the pain got worse.
She just had a flare up again at 12 which was likely the result of growing 5" in 10 months, but we took her in sooner this time and no fractures just irritated growth plates. She still took a long break and her coaches are working hard at making her use proper hand placement and technique as she starts skills again. Apparently she uses her flexibility in a way that is causing extra pressure on her wrists in some skills.
She does wear tiger paws, and has been advised to keep doing so at least until she's done growing now. Also, this season is likely a wash for her, but like has been said, her wrists have to last a lifetime so healing is more important.