The ulnar nerve travels behind the inside of the elbow before continuing toward the hand. Bending the elbow, leaning on it or changes in the tunnel can stretch or compress the nerve.
Numbness in the ring and small fingers is a common clue, but symptoms can also include hand weakness, loss of fine control and aching at the elbow or forearm.
Symptoms and warning signs
- Tingling or numbness in the small finger and the ring-finger side of the hand
- Symptoms that worsen when the elbow stays bent, including during sleep
- Weak grip or difficulty spreading and closing the fingers
- In more advanced cases, visible wasting of the small muscles of the hand
How the nerve is evaluated
Evaluation includes the neck, shoulder, elbow, forearm and wrist because the ulnar nerve can be affected at more than one point. Strength, sensation, nerve movement and provocative positions are assessed. Nerve conduction studies can help locate and grade compression when appropriate.
Nonsurgical treatment
- Avoiding prolonged elbow flexion and direct pressure on the nerve
- A night strategy or splint that prevents deep elbow bending
- Ergonomic changes at work, in the car and during sleep
- Hand therapy when weakness or altered movement needs support
When surgery may be considered
Surgery may be discussed when weakness progresses, testing shows significant compression or symptoms persist despite a careful nonsurgical plan. Options can include releasing the nerve at the elbow, with the specific approach matched to the nerve’s position and the elbow anatomy.
Sources and further reading
Frequently asked questions
Can cubital tunnel syndrome come from the wrist?
Yes. The ulnar nerve can be compressed at the wrist or higher up the arm. The symptom pattern and examination help determine where to look.
Should I ignore occasional tingling?
Occasional symptoms may settle with position and activity changes, but persistent numbness, weakness or loss of hand coordination deserves evaluation before nerve function declines.