Thumb Pain: Causes at the Base and Joint, and Relief

Quick answer

Location points to the cause; splints, activity changes and exercise help most problems

Common causes of thumb pain include basal joint (CMC) arthritis, which aches at the base of the thumb with pinching and opening jars; De Quervain’s tenosynovitis, which hurts on the thumb side of the wrist with gripping and lifting; trigger thumb, with clicking or locking and a tender lump at the base on the palm side; sprains of the thumb ligaments after a fall or catching the thumb (skier’s thumb); and nerve problems such as carpal tunnel syndrome, which cause numbness and tingling. Repetitive use of phones, tools and lifting babies are frequent triggers. Rest from aggravating tasks, thumb splints, ice or heat, anti-inflammatories if suitable and targeted exercises help, with injections or surgery reserved for persistent cases.

Important. Seek prompt care after a fall or injury if the thumb is very swollen, bruised, deformed, unstable or you cannot pinch; ligament tears and fractures may need early treatment. See a doctor urgently for a hot, red, swollen thumb or finger with fever, or after a puncture wound.

How the thumb works

The thumb has three joints: the carpometacarpal (CMC or basal) joint where it meets the wrist, the metacarpophalangeal (MCP) joint at the knuckle, and the interphalangeal (IP) joint near the tip. The CMC joint is shaped like a saddle, allowing the wide range of movement that lets the thumb touch each fingertip. Tendons run along both sides of the thumb and wrist, and ligaments stabilise each joint. This combination of mobility and heavy use makes the thumb prone to wear and overuse.

Pain at the base of the thumb

Basal joint (CMC) arthritis: deep aching at the base, worse with pinching, gripping, turning keys and opening jars; stiffness and sometimes a bump. More common in women over 50.
De Quervain’s tenosynovitis: pain on the thumb side of the wrist, worse when gripping, lifting or moving the thumb; common in new parents. See De Quervain’s tenosynovitis.
Scaphoid fracture: pain in the hollow at the base of the thumb after a fall on an outstretched hand; needs an X-ray.
Ganglion cyst: a lump near the wrist that may press on structures.

Pain on the palm side and at the joints

Trigger thumb: catching, clicking or locking, with a tender nodule at the base of the thumb on the palm side; see the NHS guide to trigger finger in the sources.
Thumb sprain (skier’s or gamekeeper’s thumb): injury to the ligament on the inner side of the knuckle after the thumb is forced backward or outward; pain, swelling and weak pinch.
Arthritis of the knuckle or tip joints from osteoarthritis, rheumatoid arthritis or psoriatic arthritis.
Gout: sudden, very painful swelling.
Infection: around the nail (paronychia) or after a cut, with redness and throbbing.

Numbness or tingling in the thumb

Tingling or numbness in the thumb, index and middle fingers, especially at night, suggests carpal tunnel syndrome, where the median nerve is compressed at the wrist; see carpal tunnel symptoms. Nerve irritation in the neck can also cause thumb symptoms, often with neck or arm pain. Weakness, wasting of the muscles at the base of the thumb or persistent numbness should be assessed.

Home care for thumb pain

Reduce or change the activity that causes pain; take breaks from phones, tablets and gaming.
Use a thumb splint (spica splint) to rest the joint, particularly at night or during heavy tasks.
Apply ice for 10–15 minutes after activity if swollen, or warmth for stiffness.
Use tools with thicker handles, jar openers and key turners to reduce pinch force.
Lift babies and objects with both hands and the palms, keeping the wrist straight.
Anti-inflammatory gels or tablets may help in the short term if suitable for you.

Exercises for thumb pain

Thumb circles and opposition: touch the thumb to each fingertip, 10 times, once pain allows.
Thumb extension with a rubber band around the fingers and thumb, 3 × 10.
Web-space strengthening: press the base of the thumb outward gently against the other hand, hold 5 seconds, 10 times; often recommended for basal joint arthritis.
Wrist stretches: palms together and gentle bends, 20 seconds.
Putty or soft ball squeezes for grip, if pain-free.
A hand therapist can tailor exercises, splints and joint protection techniques.

Medical treatment

If pain persists despite home care, a doctor may recommend a custom splint, hand therapy, a corticosteroid injection (often effective for De Quervain’s and trigger thumb, and sometimes for basal joint arthritis) or imaging. Surgery is considered for advanced arthritis that limits daily life, persistent trigger thumb, De Quervain’s that does not respond to treatment, and complete ligament tears or displaced fractures. Most procedures are done as day surgery with a period of splinting and therapy afterwards. Pain in several hand tendons is described in our guide to hand tendonitis.

Three common situations

New parent with wrist and thumb pain: De Quervain’s is common; lifting the baby with palms up and a thumb splint usually help.
Woman in her 60s with aching at the base of the thumb when opening jars: basal joint arthritis is likely; splints, adapted tools and strengthening often control symptoms.
Skier who fell holding a pole: pain and weakness at the knuckle suggest a ligament injury that should be examined early.

Key points to remember

Base-of-thumb pain often comes from arthritis or De Quervain’s.
Clicking or locking suggests trigger thumb.
Pain after a fall needs assessment for ligament injury or fracture.
Splints, activity changes and exercises help most cases.

Questions about thumb pain

These answers are general information and do not replace an examination or individual medical advice.

Why does the base of my thumb hurt?

The most common causes are arthritis of the basal joint and De Quervain’s tenosynovitis. A fall can also cause a scaphoid fracture or sprain.

Can texting cause thumb pain?

Yes. Repetitive phone use can irritate tendons and joints of the thumb. Breaks, voice typing and using both hands help.

How long does a sprained thumb take to heal?

Mild sprains usually improve in two to six weeks with a splint. Complete ligament tears may need surgery and take longer.

Is a thumb splint worth wearing?

Yes, especially for basal joint arthritis and De Quervain’s. Wearing it at night and during heavy tasks often reduces pain.

When should I see a doctor for thumb pain?

After an injury with swelling or weakness, if pain lasts more than a few weeks, or with numbness, locking, redness or fever.

Sources

This guide is for general information and does not replace medical advice. How a problem is diagnosed and treated depends on your examination and medical history. If you think you have an emergency, contact your local emergency services.