Most common precipitant of contact dermatitis is -

nickel is the most common sensitisers all over the world. the prevelance of nickel sensitivity varies from 4-13%. nickel produces allergic contact dermatitis. clinical presentation: exudative eczema, nummular eczema or dry lichenified eczema. lesions appear beneath earrings, bracelets, bangles, hairpins, rings, wrist watches,safetypins, buttons, stethoscopes. IADVL textbook of dermatology, contact dermatitis page 559