Chronic effects of occupational exposures to the skin are reviewed for barbers, fur workers, athletes, musicians, fiberglass workers, fishermen, meat packers, poultry handlers, fish flour processors, medical personnel, citrus fruit workers, seamen, and vibrating tool users. Occupational dermatoses are assessed for repeated traumas that result in workmen's compensation or disability claims. Compensation data is tabulated with projections for total compensation paid. Disabilities caused by corns and callouses among various occupational groups are cited. The prevalence of skin pathology of all types and of the most frequently occurring types is compared. Estimates are presented for the prevalence, lost workdays, and direct costs of contact dermatitis. Occupational skin cancers as a result of repeated mechanical trauma, and the effects of repeated exposures to heat and ultraviolet light are outlined. Occupational exposures are defined as carcinomas that occur as a result of environment, insofar as they are a necessary part of the occupation. Research efforts over the past century are assessed. The authors conclude that definitions need to be clarified, emotional considerations assessed, and reporting systems established to conduct a broad survey and an indepth pilot program to study the problems and their potential controls.