Elbow, Wrist & Hand
Thumb Basal Joint (CMC) Arthritis
Also called: Thumb arthritis
Wear of the thumb's basal joint — the versatile saddle joint that grants opposable-thumb powers and pays for them, especially in women over 50. Pain at the thumb's base with pinching and gripping; conservative care (splinting, strengthening, joint protection) carries most people well for years.
Common signs
- Aching at the thumb's base with pinching, gripping, jar-opening, keys
- Tenderness at the base joint; sometimes a squared-off appearance
- Grind with the compression test on exam
- Morning stiffness in the thumb
Seek help now if
- Hot red joint of sudden onset (gout/infection screen)
- Rapid deformity
- Numbness (that's carpal tunnel's territory — they often coexist)
If any of these is sudden or severe, call 911 or go to an emergency room. For the others, get examined before you start self-care.
What to do first
- A well-fitted thumb support brace for heavy-use hours changes daily life quickly
- Joint-protection strategies: bigger grips, lever tools, two-handed techniques for jars
- Begin targeted strengthening of the thumb's stabilizing muscles — evidence supports it well
The longer road
- The sustainable trio: brace strategically, strengthen consistently, protect intelligently — most people avoid procedures or put them off for years
- Flare protocol: relative rest, ice/contrast, temporary full-time bracing
- Advanced, function-limiting cases have good surgical options; strength going in still pays
Natural healing options we use
- Thumb stabilizer strengthening program
- Bracing and joint-protection coaching
- Manual and chiropractic care for thumb and wrist mechanics
- Anti-inflammatory nutrition; collagen, omega-3, vitamin D
About imaging
X-rays stage it when planning; symptoms and function drive care more than the grade.
Daily self-care
- Brace for the heavy-use blocks
- Daily thumb-stabilizer exercises
- Adaptive tools where the joint pays the highest rent (jars, scissors, pruning)
How we can help
Keep working on it at home
Once you have been examined and cleared to load it, these free home programs cover this part of the body.
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Please read: this page is education, not a diagnosis. A proper examination is how a condition gets confirmed and a plan gets built. See our medical disclaimer.