Itchy hands may be contact dermatitis. Itchy hands may be an allergy, the skin of the hands came into contact with hand sanitizer or contact with certain factors within the water leading to a localized allergic reaction for contact dermatitis. Contact with hand sanitizers, detergents, soaps, etc., these may lead to an allergic reaction on the skin of the hands, accompanied by an itching sensation. If the itching is severe, you can follow the doctor’s instructions to take oral anti-allergy drugs, such as chlorpheniramine maleate, loratadine, cetirizine and other symptomatic treatment, if the symptoms are relieved on their own, usually do not need special treatment. It is recommended to carry the chemical substances contacted when washing hands to the hospital to do allergen testing, in order to clarify the diagnosis. It is recommended to pay attention to local hygiene, avoid scratching and squeezing, and avoid contact with allergens.