My hand is sprained. It's been almost a year. It's still not healed.

Hand sprain needs to rest for a period of time, if you can not recover well, will develop into chronic inflammation. You such a situation, should be chronic inflammation. You can go to the hospital to do X-ray, magnetic resonance and other examinations, a clear diagnosis. If not very serious, you can through rest, external use of blood stasis drug treatment.