These articles provide some different perspectives on the medical treatment of various ailments affecting performers.
Back issues are available.
Quite often, if you have any one of these, you'll have several others as well. There is no simple easy definition, since the symptoms and affected bits of the body vary greatly from person to person, and task to task. Some of the worst things you can do to yourself include not only lots of finger motion, but grasping and squeezing, leaning on a desk edge with your wrists, palms, or elbows, holding a phone with your shoulder, carrying a shoulder bag, bad posture. The initial symptoms often involve the tendons. If it's ignored, scar tissue starts to form around the tendon sheath, causing even more friction and inflamation.