If you have pain at the base of your thumb went gripping items between your thumb and index finger you may basilar joint arthritis. The pain is the results from cartilage wear leading to bone rubbing on bone.
What is Basilar Joint Arthritis?
Basilar joint arthritis, also sometimes called thumb arthritis, is the result of the wearing away of cartilage in the joint at the base of the thumb. Without the cushioning mechanism of this cartilage, the joints will grind over each other when the thumb moves, causing further joint damage. The most common causes of basilar joint arthritis include wear and tear of the hand and injury to the thumb.
Common signs and symptoms of thumb arthritis include:
Hand stiffness and pain: One of the most common signs of basilar joint arthritis is pain, stiffness, and tenderness at the base of your thumb.
Decreased range of motion and strength: Inflammation and discomfort can cause your hand to lose both strength and range of motion. This can become obvious when you try to pinch or clasp an object tightly, such as opening a jar or using buttons or zippers.
Changes in appearance: Your thumb may appear swollen, particularly at the base, and a bony bump may develop. One obvious sign is an improper alignment of the joint as it shifts, affecting the joint above the base and creating a bent-back appearance (hyperextension).