Ulnar wrist pain refers to pain on the side of the wrist that is closest to the pinky finger, which is known as the ulnar side of the wrist. Ulnar wrist pain can be caused by a variety of conditions, including:

1. Ulnar impaction syndrome: This condition is caused by a problem with the ulna bone, which is one of the two bones in the forearm. In ulnar impaction syndrome, the ulna bone is too long, which can cause it to rub against the wrist bones, leading to pain and swelling.
2. Triangular fibrocartilage complex (TFCC) injury: The TFCC is a group of ligaments and cartilage that helps to stabilize the wrist joint. An injury to the TFCC, such as a tear or strain, can cause ulnar wrist pain, as well as weakness and instability of the wrist.
3. Wrist arthritis: Arthritis can affect any joint in the body, including the wrist. In wrist arthritis, the cartilage that cushions the joint wears down, causing pain, stiffness, and swelling.
4. Tendinitis: Tendons are fibrous cords that attach muscles to bones. Tendinitis is an inflammation of a tendon, and can occur in any tendon in the wrist, causing pain and swelling.
5. Carpal tunnel syndrome: Carpal tunnel syndrome is a condition in which the median nerve, which runs through a narrow passageway in the wrist called the carpal tunnel, becomes compressed. This can cause pain, numbness, and weakness in the wrist and hand.

Treatment for ulnar wrist pain depends on the underlying cause of the pain. It may include rest, ice, anti-inflammatory medication, physical therapy, and in some cases, surgery. It is important to seek medical attention if you experience persistent or severe ulnar wrist pain, as early treatment can prevent further damage and improve outcomes.

A common cause of ulnar wrist pain is a fall onto an outstretched hand. This can break bones in the wrist. Sports like tennis, golf, and football can sometimes bend the wrist back too far and this can damage tendons and ligaments. Carpenters and plumbers may develop ulnar wrist pain because they often must use tools in small spaces that require awkward positioning of the wrist.

Treatment for some types of ulnar wrist pain may include surgery. Minimally invasive techniques may be used and can speed recovery.