Ulnar nerve entrapment, also known as cubital tunnel syndrome, occurs when the ulnar nerve in the elbow is compressed. This can cause a range of symptoms, including tingling, numbness, or pain in the hand and fingers, weakness in grip strength, and difficulty with fine motor tasks. If left untreated, the protective myelin sheath around the nerve can wear away, potentially leading to permanent damage.

Ulnar nerve entrapment is often caused by trauma to the elbow, such as a fracture, which can result in swelling that compresses the nerve. Other risk factors include repetitive movements of the elbow, diabetes, arthritis, and alcoholism.

Conservative treatments for ulnar nerve entrapment include keeping the elbow in a neutral position, avoiding crossing the arms, using ergonomic equipment, wearing a brace, and receiving steroid injections to reduce swelling. If these treatments are ineffective, surgery may be necessary to relieve pressure on the nerve. Early diagnosis and treatment are important to prevent permanent nerve damage.