Swelling and pain at the root of the thumb is considered to be caused by tenosynovitis, osteoarthritis, rheumatoid arthritis and other reasons.
1. Tendovaginitis: caused by frequent extension and flexion activities of the thumb, such as frequent use of cell phones, computers, etc., which will cause frequent friction of the tendon in the tendon sheath, resulting in aseptic inflammation and swelling and pain at the root of the thumb.
2. Osteoarthritis: caused by degenerative joint disease, mostly seen in elderly patients. Frequent wear and tear of the joints will cause degenerative damage to the articular cartilage and osteophytes in the joints, causing swelling and pain at the root of the thumb.
3. Rheumatoid arthritis: an autoimmune disease, mainly characterized by erosive synovitis, can also cause damage to articular cartilage and bone, and mainly involves the joints of the limbs, can also cause swelling and pain at the base of the thumb.
It can be seen that the causes of swelling and pain at the base of the thumb are very many, if the symptoms are serious or have not been able to relieve, you should go to the hospital for further treatment.