I don't have a remedy but I can tell you what I would do.
First I would book an appointment with an osteopath. If you've never heard of one before then this is the time to do so. They are medical doctors who do extensive work with muscular-skeletal problems. They use a very gentle type of manipulation to help reduce inflammation (kind of like a chiropractor but actual doctors and it doesn't hurt or crack or anything creepy like that).
Secondly, if your wrists are weak the osteopath may and should suggest physical therapy to increase your strength. If your sister suffers from this too it may be a genetic thing that needs attention.
Anyway, that's what I would do. I've had a few injuries (pelvic, and wrist) and I went to an osteopath and now my osteopath is my primary care doctor, I go to her for everything even a common cold. My wrist/thumb pains were taken care of quite easily and I have not had a problem since. I was disabled for 3 months from it. I do take precautious care of my wrists/hands now, like I avoid carrying heavy things, even opening heavy doors if I don't have to, I ask people to open doors for me. I don't lift my son unless it's absolutely necessary and I avoid putting pressure on my wrists by doing yoga etc. I'm a musician, my hands are my livelihood so I'm super serious about their longevity.
"If you pay attention to when you are hungry, what your body wants, what you are eating, when you've had enough, you end the obsession because obsession and awareness cannot coexist." - Geneen Roth
Last edited by Palestrina; 04-10-2014 at 08:08 AM.