Cubital tunnel syndrome is a condition caused by pressure or stretching of the ulnar nerve, which passes through a narrow passage called the cubital tunnel on the inside of the elbow. This nerve controls sensation in the ring and little fingers and helps power some of the muscles in the hand and forearm. The syndrome often develops when the elbow is bent for long periods or when there is repeated pressure on the area, such as leaning on the elbow or frequent flexion during certain activities. Because the ulnar nerve is relatively exposed at the elbow, it is
vulnerable to compression or irritation.
Common symptoms include numbness, tingling, or a “falling asleep” sensation in the ring and little fingers, especially when the elbow is bent. As the condition progresses, it may lead to weakness in the hand, reduced grip strength, or even visible muscle wasting in severe cases. Symptoms often worsen at night or during activities that keep the elbow bent for a long time, such as talking on the phone or sleeping with the arms tucked in. Cubital tunnel syndrome can affect daily function and comfort, especially if left unaddressed.
