First dorsal compartment tendonitis, more commonly known as deQuervain’s tendonitis or tenosynovitis after the Swiss surgeon Fritz de Quervain, is a condition brought on by irritation or inflammation of the wrist tendons at the base of the thumb. The inflammation causes the compartment (a tunnel or a sheath) around the tendon to swell and enlarge, making thumb and wrist movement painful. Making a fist, grasping or holding objects—often infants—are common painful movements with deQuervain’s tendonitis. To read more, click on the link below.
https://www.assh.org/Public/HandConditions/Pages/deQuervainsTendonitis.aspx