Whether old or young, you should check your scalp before dyeing your hair. If there are scars, boils and dermatitis, it is best not to dye your hair. Patients with hypertension and heart disease and pregnant and puerperal women should not dye their hair.
People who dye their hair for the first time should do skin allergy tests to avoid allergic reactions and allergic dermatitis. Before dyeing your hair, apply a little hair dye to the skin inside your arm or behind your ears. Only when there are no abnormal reactions such as blisters and burning sensation within two days can you dye your hair.
Wear gloves when dyeing hair to avoid skin contact with hair dye. If the hair dye drips into eyes or skin, please rinse it repeatedly with clear water. Wash your hair and scalp thoroughly after dyeing your hair, and don't scratch hard when shampooing or shampooing to avoid scalp injury and poisoning.
Dye your hair as often as possible. Instead, we should dye less or widen the time distance between two hair dyes, and the interval between two hair dyes should be at least three months. If it is color dyeing, you should choose natural plant synthetic dyes.