Why Is My Thumb Hurting? 8 Causes & How to Find Relief

Thumb pain most often comes from De Quervain's tenosynovitis (base of thumb, radiates to wrist), basal joint arthritis (deep ache with gripping), trigger thumb (catches or locks when bending), or overuse from texting and repetitive motions. The location and movement that triggers pain narrow it to the right diagnosis quickly.

8 Causes of Thumb Pain

The thumb does 40% of the hand's work and has a uniquely complex joint at its base — the carpometacarpal (CMC) joint — that moves in all directions and bears significant load. This makes the thumb more injury-prone than any other finger.

De Quervain's Tenosynovitis

The most common cause of thumb and wrist pain in adults, especially new parents, athletes, and heavy phone users. The two tendons that control thumb extension and abduction (APL and EPB) run through a narrow tunnel at the wrist. Inflammation of this tunnel causes pain on the thumb side of the wrist that radiates down the forearm.

Diagnostic test — Finkelstein's test: Tuck your thumb inside your fist, then bend your wrist toward your little finger. Sharp pain on the thumb side of the wrist is a positive test for De Quervain's.

"De Quervain's tenosynovitis is an overuse condition affecting the tendons on the thumb side of the wrist. It commonly presents in new mothers, golfers, and occupations requiring repetitive wrist and thumb motion. Treatment includes activity modification, splinting, and corticosteroid injection in refractory cases." — American Academy of Orthopaedic Surgeons

Fix: Rest, ice for 10–15 minutes 3× daily, ibuprofen, and a thumb spica splint that immobilizes both the thumb and wrist. Most cases resolve in 4–6 weeks with conservative treatment.

Basal Joint Arthritis (CMC Arthritis)

The carpometacarpal joint at the thumb's base is the most commonly arthritic joint in the hand. Women over 40 are disproportionately affected due to laxer ligaments and hormonal changes that accelerate cartilage loss. Basal joint arthritis produces a deep, achy pain at the very base of the thumb that worsens with gripping, pinching, and turning keys.

You may also notice a visible squarish prominence at the base of the thumb as the joint thickens over time.

Fix: Splinting, activity modification, anti-inflammatory medications, and hand therapy for strengthening the surrounding muscles. Corticosteroid injections provide 3–6 months of relief. Severe cases may require surgical joint replacement.

Trigger Thumb

In trigger thumb (stenosing tenosynovitis of the flexor tendon), a nodule forms on the flexor tendon that catches on the pulley mechanism as the thumb bends. The thumb may click, get stuck in a flexed position, or require manual straightening with the other hand. It's painful at the base of the thumb toward the palm.

Trigger thumb is associated with repetitive gripping, diabetes, and rheumatoid arthritis.

Fix: Splinting the thumb in extension overnight, anti-inflammatory medication, and corticosteroid injection at the A1 pulley. Persistent cases require a minor surgical release.

Texting Thumb / Gamer's Thumb

Prolonged or repetitive thumb use in typing, gaming, or instrument playing causes tendon irritation along the extensor tendons of the thumb. Unlike De Quervain's, the pain is on the dorsal (top) aspect of the thumb and proximal phalanx rather than the wrist.

This is an overuse injury — the tendons are inflamed, not damaged. Rest is the primary treatment.

Fix: Stop or significantly reduce the provocating activity for 2 weeks. Use your index finger for scrolling instead of the thumb. A thumb stabilizer brace supports without completely immobilizing.

Carpal Tunnel Syndrome

Compression of the median nerve at the wrist causes pain, numbness, and tingling in the thumb, index, and middle fingers. Thumb pain from carpal tunnel is nerve-type pain — often described as burning or electric — rather than mechanical joint pain. Symptoms are classically worse at night and on waking.

Fix: Wrist splints worn at night keep the wrist in a neutral position and substantially reduce nighttime symptoms. Corticosteroid injection and, for severe cases, surgical carpal tunnel release are further options.

Sprain or Ligament Injury (Skier's/Gamekeeper's Thumb)

A sprain to the ulnar collateral ligament (UCL) of the thumb — from falling on an outstretched hand or having the thumb bent forcefully backward — causes pain, swelling, and instability at the metacarpophalangeal joint. If you can't pinch objects or the thumb feels unstable, the UCL may be partially or fully torn.

Fix: Minor sprains respond to buddy-taping and splinting. Full UCL tears typically need surgical repair. See a hand surgeon if the thumb feels unstable after an injury.

Gout

Gout in the thumb — less common than gout in the big toe — produces sudden, severe pain, redness, and swelling at a thumb joint, often starting overnight. It's caused by uric acid crystal deposition. The flare typically resolves in 3–10 days even without treatment.

Fix: NSAIDs or colchicine during acute attacks, uric acid-lowering medication (allopurinol) for recurrent gout. Dietary reduction of purines (red meat, shellfish, alcohol) reduces frequency.

Fracture

A Bennett's fracture (at the base of the first metacarpal) or a distal phalanx fracture can result from jams, catches, or falls. Fractures cause immediate, sharp pain, swelling, and often bruising or deformity. Any thumb pain following a specific injury should be evaluated with an X-ray.

Also Read: Why Is My Knee Joint Hurting? 11 Causes & Relief Options

Thumb Pain by Location

In Short

Thumb pain at the base that worsens when gripping points to De Quervain's or basal joint arthritis. Pain that includes clicking or locking is trigger thumb. Nighttime numbness and burning suggest carpal tunnel. After an injury, get an X-ray to rule out fracture. Most non-injury thumb pain responds to rest, a thumb splint, and anti-inflammatory medication within 2–6 weeks.

What You Also May Want To Know

Why does the base of my thumb hurt?

Pain at the base of the thumb most commonly indicates basal joint arthritis or De Quervain's tenosynovitis. A positive Finkelstein test (sharp pain when tucking the thumb in a fist and bending the wrist down) strongly suggests De Quervain's.

Why does my thumb hurt when I text?

Repetitive thumb motion causes tendon irritation called De Quervain's tenosynovitis or extensor pollicis tendinitis. Rest, ice, and a wrist brace that immobilizes the thumb are the first-line treatment.

Why does my thumb hurt when I bend it?

Pain when bending the thumb can indicate trigger thumb, where a nodule on the flexor tendon catches inside the tendon sheath. The thumb may click or lock.

Can carpal tunnel cause thumb pain?

Yes. Carpal tunnel syndrome compresses the median nerve, causing thumb pain typically accompanied by tingling or numbness, particularly at night. Wrist splinting at night often provides significant relief.

When should I see a doctor for thumb pain?

See a doctor if the pain followed an injury, if numbness accompanies the pain, if the pain has lasted more than 2 weeks without improvement, or if you can no longer grip objects normally.

Reviewed and Updated on May 31, 2026 by George Wright