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)
Any of these: call 911 or get to an emergency room first. Everything else can wait.
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
If it's become chronic
- The sustainable trio: brace strategically, strengthen consistently, protect intelligently — most avoid or long-delay procedures
- 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)
More in Elbow, Wrist & Hand
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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.