CMC joint pain refers to pain arising from the carpometacarpal (CMC) joint, specifically the one at the base of the thumb. This is commonly due to the wearing down of this joint, leading to thumb arthritis, also known as CMC arthritis or basal joint arthritis.
Understanding the CMC Joint
The CMC joint is where the thumb’s metacarpal bone connects to the wrist's carpal bone.
| Location | Description |
|---|---|
| Base of thumb | Where the thumb bone (metacarpal) meets the wrist bone (carpal). |
Causes of CMC Joint Pain
- Age-related wear and tear: The most frequent cause of CMC joint pain is the progressive deterioration of cartilage, often due to aging. This is known as osteoarthritis.
- This can result in bones rubbing against each other, causing pain and inflammation.
- Overuse: Repetitive actions or strenuous activities can accelerate the wear and tear of the joint.
- Injury: A direct impact or trauma to the joint may cause damage.
- Genetics: There may be a hereditary predisposition to developing thumb arthritis.
Symptoms of CMC Joint Pain
- Pain at the base of the thumb, which may worsen with use.
- Stiffness, especially in the morning or after periods of inactivity.
- Swelling and tenderness around the joint.
- Reduced strength in the thumb and difficulty with gripping, pinching or twisting actions.
- Grinding or clicking sensations in the joint.
Treatment Options for CMC Joint Pain
Treatment will vary based on the severity of the pain and may include:
- Conservative treatment:
- Rest, ice, and heat applications.
- Pain relievers such as NSAIDs (nonsteroidal anti-inflammatory drugs).
- Splinting or bracing to immobilize the joint.
- Physical therapy.
- Injections: Corticosteroid injections can provide temporary relief.
- Surgery: In severe cases, surgery like joint fusion or replacement might be needed.
