Thumb pain can result from various conditions, such as arthritis, de Quervain's tenosynovitis, trigger finger, skier's thumb, or carpal tunnel syndrome. The base of the thumb—called the carpomet ...

De Quervain's tenosynovitis is inflammation of the two tendons that run along the thumb side of your wrist. It can cause pain at the base of your thumb and where the thumb meets your wrist.