You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Most common precipitant of contact dermatitis is - and explain in detail?
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