Work-related chronic injuries occur in muscles, tendons, and nerves. E
pidemiological, histological, and physiological data confirm their oft
en disputed physical basis. Terms such as repetitive strain injury and
cumulative trauma disorder, when used as a diagnosis, have obscured t
he issue for they are really statements of causation. Definitive diagn
osis is required both to treat and prevent such injuries. Precise term
inology that identifies the tissue and its pathology is required. A de
tailed assessment methodology is described that allows a precise diagn
osis. A clear relationship to work stress is necessary both to establi
sh the cause and formulate prevention strategies. Treatment must begin
early and be appropriate to the tissue and the nature of the injury.
Examples are presented and discussed. Early treatment begins before to
o much damage has been done and yields better results.