DeQuervain's Tenosynovitis is condition that causes pain on the thumb side of the wrist from swelling or inflammation around a tendon. Tendons are strong bands connecting muscles to bones. 

Causes: DeQuervain's Tenosynovitis is often causes by repetitive movements in the wrist or thumb. Often, this is seen in women aged 30-50 years old. This is sometimes seen in women after pregnancy. 

Symptoms: Pain at the thumb side of the wrist that worsens with thumb motion. This area is the first dorsal extensor compartment. There may be swelling and patients may complain of difficulty holding or gripping things. 

Treatment: DeQuervain's Tenosynovitis may improve with rest, immobilization with a splint, and anti-inflammatory medications. Sometimes, a steroid injection is recommended to decrease inflammation. If these treatments do not help, surgery is recommended. 

Surgery: A small incision is made along the first dorsal extensor compartment of the wrist and the space around the tendons is widened. This allows for the tendons to move more freely. After surgery you will be placed in a splint for 2 weeks. You can shower, but must keep the splint covered and dry.