**Thumb Arthritis: Causes, Symptoms, and Treatment Options**
Thumb arthritis is a common joint condition that affects the base of the thumb, making everyday activities like gripping, writing, opening jars, and holding objects painful and difficult. Medically known as **basal joint arthritis** or **carpometacarpal (CMC) joint arthritis**, it occurs when the cartilage that cushions the bones in the thumb joint wears down over time, leading to pain, stiffness, and reduced hand function.
### What Causes Thumb Arthritis?
Thumb arthritis typically develops due to the gradual breakdown of cartilage in the CMC joint, located at the base of the thumb near the wrist. This wear-and-tear process is known as osteoarthritis. As the cartilage deteriorates, the bones begin to rub against each other, causing inflammation and pain.
Several factors increase the risk of developing thumb arthritis:
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