The invention relates to methods for prevention and/or treatment of skin lesions
caused by exposure to ultraviolet radiation. Exemplary condition that can be prevented
or treated are actinic keratosis, dry skin, polymorphic light exanthema, photopathology,
photo-allergy, solar atrophy, stria migrans, elastoma diffusum, X-ray dermatitis,
gouty polychondritis and decubitis ulcer. The method employs application to the
skin of a composition comprising a hydroximic acid derivative of the formula
##STR1##
