Ulnar Nerve Entrapment

The quickest clue is which fingers go numb. Ulnar nerve entrapment affects the ring and little fingers ^1,4. Carpal tunnel syndrome involves a different nerve at the wrist and different fingers. Our carpal tunnel page explains that pattern.

Carpal tunnel is the more common of the two ^2,4, and they often travel together: people with ulnar nerve entrapment are often diagnosed with carpal tunnel syndrome at the same time ¹. Finding one doesn't rule out the other.

We also check your neck. The ulnar nerve starts from nerve roots at the C8 and T1 levels ⁴, so irritation there can affect the same fingers. That's standard assessment practice, not a research finding, but a good reason not to assume the elbow.

It starts with your story and a hands-on examination ^{1 5}. A clinician asks about your work, your activities and your medicines, then checks the feeling and strength in your hand and fingers ⁶. They'll tap over the nerve at the funny bone. A shock into the ring and little fingers suggests an irritated nerve, although that can happen with a healthy one too ⁶. They'll also watch whether the nerve slips out of its groove as you bend your elbow, and check your neck, because a pinched nerve there can cause similar symptoms ⁶.

X-rays don't show most causes of the squeeze. They're for spotting bone spurs or arthritis crowding the nerve ⁶.

First we work out where the nerve is being compressed, how severe it is, and what in your week is causing it. Ulnar nerve entrapment treatment then usually involves:

A trapped ulnar nerve is not a torn tissue waiting to knit, so The Well Motion Recovery Path™ runs a little differently here. You move up a phase when your hand copes with more, not when a date comes round.

• Reset: from the first visit. We find the elbow positions that set your symptoms off and change them, and you keep the elbow out of full bend overnight with a night splint or a rolled towel ^1,5. Expect the numbness to come and go at first. We move you on once it is settling instead of spreading.
• Rebuild: a trial of 6 to 12 weeks, the period one systematic review recommends ². Nerve glides and manual therapy are added to the positioning, which stays. Expect good and bad days. We move you on when your hand does what your daily tasks ask of it.
• Return: back to the desk, the tools, the long drive or, for throwers, a graded build through sports physiotherapy. We recheck feeling and grip. You leave with elbow habits and a night set-up to keep using.

How long it usually takes. Often slowly ². In one trial nearly 90% of people had improved at six months ². With education and activity changes alone, symptoms took a median of 11 months to plateau ². That evidence covers mild and moderate cases ². In severe ones, surgery is considered when this care has not worked ⁵.

Changing how you use your elbow has moderate-strength evidence as a treatment for mild to moderate cases ². It hasn't been tested as prevention, but it's the obvious place to start:

• Keep your elbow off hard edges. Leaning on it presses on the nerve. Don't rest it on the armrest, don't drive with your arm on the open window, and check your desk chair isn't too low ⁶.
• Limit long spells with the arm bent. Bending stretches the nerve around the bone and cuts its blood supply, so break up phone calls and long drives ⁶.
• Lighten forceful work. In a Danish study, forceful work raised the odds of ulnar neuropathy by up to 3.85 times, more so in awkward postures. Repetitive movement alone didn't ⁷.
• Quit smoking. People with more than 24 pack-years of smoking had over four times the odds, and smoking went with more severe nerve damage on testing ⁸. Quitting is on the Australian prevention list too ¹.