Cubital Tunnel Syndrome

Cubital tunnel syndrome is the second most common peripheral nerve compression after carpal tunnel syndrome. It occurs when the ulnar nerve becomes compressed or irritated as it passes through the cubital tunnel on the inside of the elbow. This nerve controls sensation to the ring and small fingers and powers many of the small muscles in the hand.

Prolonged elbow flexion, leaning on the elbow, or anatomical variations can cause nerve compression. At Mountain Spine & Orthopedics, our specialists use advanced diagnostic techniques including nerve conduction studies to accurately assess ulnar nerve function and guide treatment decisions.

Cubital tunnel syndrome symptoms typically include:

• Numbness and tingling in the ring and small fingers, especially when the elbow is bent
• Aching pain on the inside of the elbow
• Weakness in grip strength and difficulty with fine motor tasks
• Hand clumsiness or dropping objects
• Muscle wasting in severe cases, visible in the hand between thumb and index finger

Symptoms often worsen at night or when holding a phone to the ear.

Risk factors for cubital tunnel syndrome include:

• Prolonged or repetitive elbow flexion (sleeping with bent elbows, desk work)
• Leaning on the elbow for extended periods
• Previous elbow fractures or dislocations
• Arthritis or bone spurs in the elbow
• Cysts or other growths near the cubital tunnel
• Diabetes and other conditions affecting nerve health

Diagnosis begins with a thorough physical examination including the elbow flexion test and Tinel's sign at the elbow. Our specialists assess grip strength, finger coordination, and sensation patterns to localize the nerve compression.

Nerve conduction studies (NCS) and electromyography (EMG) are essential for confirming the diagnosis, determining severity, and ruling out other conditions like cervical radiculopathy. These tests measure how well the ulnar nerve transmits electrical signals.

Non-Surgical Treatment

Early-stage cubital tunnel syndrome often improves with conservative measures:

• Activity modification—avoiding prolonged elbow flexion and pressure on the elbow
• Night splinting to keep the elbow in a straighter position during sleep
• Elbow pads to protect the nerve from direct pressure
• Anti-inflammatory medications and nerve-gliding exercises

Surgical Options

When conservative treatment fails or nerve damage is progressing, cubital tunnel surgery may be recommended. Options include simple decompression or ulnar nerve transposition, where the nerve is moved to a less vulnerable position. Our surgeons use minimally invasive techniques for faster recovery.

The discomfort from cubital tunnel syndrome results from compression and stretching of the ulnar nerve. The "funny bone" sensation when hitting your elbow is actually the ulnar nerve—patients with cubital tunnel syndrome experience this feeling more frequently and severely. Pain often radiates down the forearm to the hand.

Prevention Tips

• Avoid resting your elbow on hard surfaces for prolonged periods
• Keep your elbow straight when sleeping—consider a towel wrapped around the elbow
• Use a headset instead of holding a phone to your ear
• Take breaks during activities requiring sustained elbow flexion
• Maintain good posture at your workstation

If you're experiencing numbness in your ring and small fingers or elbow pain, schedule a consultation with our hand and nerve specialists. We offer same-day and next-day appointments at our FL, NJ, NY, & PA locations. Take advantage of our free second opinion to ensure you receive the right diagnosis and treatment.