Hand wearing a black thumb support brace next to a glass jar in a kitchen

Thumb Arthritis: How a Thumb Splint and Simple Changes Ease the Pain

Short answer: arthritis at the base of the thumb (the basal or CMC joint) is one of the most common forms of hand osteoarthritis, especially in women over 40. It causes pain with pinching and gripping: opening jars, turning keys, pulling up zips. The American Academy of Orthopaedic Surgeons lists a supportive splint, ice or heat, and anti-inflammatory medication as the early treatments, and Mayo Clinic adds activity changes and hand therapy. A splint rests and stabilises the joint so it hurts less during use. These steps control symptoms for many people for years.

What does thumb arthritis feel like?

  • Aching or sharp pain at the base of the thumb, near the wrist, when you grip, pinch or twist.
  • Swelling, tenderness and stiffness at the base of the thumb.
  • Weaker pinch and grip. Dropping things.
  • A grinding sensation, and in later stages a bump or squared-off look at the base of the thumb.

Pain on the thumb side of the wrist when lifting a child or a pan with the thumb up is more typical of De Quervain's tendinitis, which is also treated with a thumb spica splint. A doctor can tell them apart.

How does a thumb splint help?

A thumb spica splint supports the base of the thumb and limits the painful sliding of the worn joint while leaving the fingers, and usually the tip of the thumb, free to work. Mayo Clinic notes that a splint can decrease pain, encourage proper positioning of the joint during tasks and rest the joint. Two styles are useful:

  • Soft neoprene or fabric supports. Warm and flexible. Good for daytime tasks because you can still use the hand.
  • Firmer splints with a stay or moulded shell. More restrictive. Good for flare-ups and for wearing at night to rest the joint.

How and when should I wear a thumb splint?

  • During activities that provoke pain: cooking, gardening, writing, DIY, long periods of phone use.
  • At night during a flare-up.
  • Fit it snugly around the wrist and thumb base without pressing on the sore joint itself. No numbness or tingling.
  • Take it off several times a day to move the thumb gently, so it does not stiffen.

See thumb and wrist supports in our hand and wrist range and our arthritis relief collection.

What else eases thumb arthritis at home?

  • Heat for stiffness, cold for flare-ups. A warm soak or heat pack before activity and a cold pack for 10 to 15 minutes after a heavy day. See heat or ice for pain.
  • Joint-friendly tools. Jar openers, key turners, wide-grip pens and utensils, electric can openers, lever taps and spring-loaded scissors all reduce pinch force.
  • Change the grip. Use the whole hand or both hands instead of a tight thumb-and-finger pinch. Carry bags on the forearm.
  • Gentle exercises. Touch the thumb tip to each fingertip in turn to make an "O", and slide the thumb across the palm toward the base of the little finger. Slow, pain-free repetitions, daily.
  • Compression gloves provide warmth and light support. We look at the evidence in Do arthritis gloves work?

When should I see a doctor about thumb pain?

See a doctor if thumb pain persists despite a few weeks of splinting and activity changes, if it is interfering with daily tasks or sleep, if the joint is hot, red and very swollen, or if you have numbness or tingling. Steroid injections and, for advanced arthritis, reliable surgical options are available.

Key takeaways

  • Pain at the base of the thumb with pinching and twisting is often basal joint arthritis.
  • A thumb splint rests and stabilises the joint: soft for daytime tasks, firmer for flare-ups and nights.
  • Heat, cold and joint-friendly tools reduce daily strain.
  • Use larger grips and both hands instead of a tight pinch.
  • Persistent pain deserves assessment, since effective medical treatments exist.

Sources

This article is general wellness information and is not medical advice. It does not replace an examination by a qualified healthcare professional. If your pain is severe, sudden or getting worse, please see a doctor.

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