How does Mercury causes rashes?

Mercury has not been scientifically proved to directly cause skin rashes. Some rashes may occur as allergic reactions to products made with mercury, such as some skin bleaching creams and cosmetics.

Common causes of skin rashes in general may include allergies, infections, certain medical conditions, medications, environmental irritants, or autoimmune diseases. If you have ongoing rashes for any reasons, kindly consult a doctor or dermatologist for a proper diagnosis and advice.