Arthritis often affects an important joint at the base of the thumb in patients after fifty, known as the trapezio-metacarpal joint. Cartilage in the joint becomes worn and bare bone rubs against bare bone, which causes pain.
What causes basal thumb arthritis?
This joint is very mobile and the thumb is used in almost any hand function. It is no surprise that after forty of fifty years, this joint becomes damaged. A genetic predisposition exists.
Symptoms
Symptoms include pain and swelling at the base of the affected thumb along with decreased range of motion and weakening. A deformity can be present with advanced cases.
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