Colles fracture is a break in the end of the lower arm bone (radius) just above the wrist. Colles fractures are a very common injury among adults. Particularly at risk are middle-aged to elderly women who suffer from the bone weakening disease, osteoporosis.

Causes
When someone begins to fall, they almost always extend their hand to reduce the force of hitting the ground. When they fall on the outstretched hand, the sudden impact of their body weight on the hand may cause the end of the lower arm bone (radius) to fracture just above the wrist. This is known as a Colles fracture.

Symptoms
Signs of a Colles fracture include pain and swelling just above the wrist, and an inability to hold or lift objects of any significant weight. The wrist may be pushed back over the broken bone resulting in a "forked" appearance of the hand.

Treatment
Treatment may include repositioning bones and immobilization using a splint or cast. Fractures with three or more pieces of broken bone, known as a comminuted fracture, may require pins or other devices to hold the bones in proper position while they heal. Many patients heal from a Colles fracture without any complications, but some people may not regain full mobility of their wrist joints. Chronic pain may result from ligament injury. Other possible complications include post-traumatic arthritis and median nerve damage/compression leading to carpal tunnel syndrome.