The bones, connective tissue and small joints of the hands and wrists are prone to several types of injuries. These injuries can happen in otherwise healthy joints – for example, a blow to the finger causes it to bend backward or jamming a finger causes the tendons to pull away from the bone. In other cases, a disease process may make an injury more likely. For example, wrist bones weakened by osteoporosis are prone to fracture. The following are some of the more common hand and wrist injuries.
Flexor Tendon Injuries
The flexor tendons are long strands of connective tissue that connect muscles in the forearm to the small bones of the finger and thumb, enabling them to move. If one of these tendons is severely injured the finger it connects to cannot move.
The most common causes of flexor tendon injuries are cuts and sports injuries. Flexor tendons may also rupture spontaneously in people with rheumatoid arthritis.
Learn more about flexor tendon injuries from the American Academy of Orthopaedic Surgeons.
Extensor Tendon Injuries
Injuries to the extensor tendons (tendons on the backs of the hands and fingers that enable fingers and thumbs to straighten) can result in a number of different problems. The most common are:
- Mallet finger – a drooping of the end of the finger that occurs when an extensor tendon becomes separated from the bone. This can happen if the finger is cut or jammed. It is also called baseball finger.
Read more about mallet finger from the American Academy of Orthopaedic Surgeons.
- Boutonniere deformity – a deformity in which the joint in the middle of the finger (proximal interphalangeal joint or PIP) bends toward the palm and the joint closest to the nail (distal phalangeal joint or DP) bends upward. It can result from a cut or tear of the extensor tendon at the middle joint, a blow to the bent finger or damage from rheumatoid arthritis.
Learn more about boutonniere deformity from the American Academy of Orthopaedic Surgeons.


































Ever since then, I haven't been back to normal. It's been almost 7 months since the injury. No one could figure out why I was still having pain in that area with no other symptoms.
After a wrist specialist looked at my MRIs and my X-Rays, he found out that I have something called a Negative Ulna. The Ulna bone is too short by almost 1/4-1/2 inch.
Really a bummer, since I'm 23 and told that I'll definitely have arthritis where the Ulna bone comes short. I already show symptoms of arthritis. Lots of loud cracking sounds, stiffness and pain.
It's getting hard to find anything so I can exercise my arms without using my hands/wrist. Any suggestions? (Tried looking things up online, but there is virtually nothing out there for a Negative Ulna except for something called Negative Ulnar Variance that's linked to Kienbock's Disease)
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