Hey Nancy1116,
The first thing I would suggest is to see your physician. Typing can create several repetitive stress injuries, such as, tendenitis or carpal tunnel syndrome. Your doctor may suggest an anti-inflamatory such as ibuprofen, cortisone injection, or visiting with an occupational therapist (depending on the severity of symptons). The therapist has a number of modalities available to help reduce your pain and strengthen the many muscles and tendons, in your wrist that may be causing you problems.
In the mean time I would suggest rest first of all, If it is a form of tendinitis this is diffanetly the best solution. If you can not rest atleast try to curb the amount of typing you do. You can also try icing to help reduce inflamation of tendons, ligaments, and muscles, and stretching to help reduce the tightness. Muscles, tendons, and ligaments have a terrible tendency to tighten and or swell when injured.
Good Luck,
Brent Brookbush NASM, NSCA, IFPA CPT & ACSM H/FI