Often injuries to the hand and wrist joints occur due to a fall. It is human nature to try and stop yourself from falling. An outstretched hand during a fall can overstress the joint and even tear ligaments or even break bones.
Often an injury like this is minor and is just very painful. A doctor may treat a patient with an anti-inflammatory and rest. In some cases a type of splint may be used for protection and to keep the joint in a fixed position for healing.
Sometimes a joint may have a more serious injury and surgery may be needed. There are many ways to approach surgery because injuries are generally looked at on a case by case basis.
A severe injury to the wrist can lead to arthritis settling into that wrist. arthritis can limit mobility due to pain and can also lead to swelling and numbness in the area.