Wrist injuries are common in skateboarders. A fall on an outstretched hand can put a lot of force through that area. And there are many possible injuries that can occur. There are numerous ligaments in the wrist holding everything together.
If the force is strong enough, one or more ligaments can be damaged. Without the ligamentous support, the bones can shift and/or dislocate. Fractures can occur at the same time. Often there is damage to the nerves and blood vessels. Without proper blood supply, healing is further delayed.
It may be a good idea to see an orthopedic surgeon for an evaluation. The surgeon will carefully examine the hand, wrist, and arm. Additional tests such as X-rays or more advanced imaging may be needed. With wrist injuries, early detection of more serious problems can help provide a good result.