Any form of direct trauma such as hitting the ground on your golf swing can cause injury to the wrist and hand. Improper hitting or punching techniques can cause wrist/hand injuries and possibly hairline fractures.
Head & Neck Problems:
The most common cause of pain in wrist and hand is the position of your neck. The nerves that power your hand come from your neck. When sitting doing computer work, your neck may be in an improper position and this may compromise those nerves. When those nerves are compromised, you may experience traveling pain in your hands as well as put your hands vulnerable to repetitive stress injury.