Harm of cold water shampoo

The hazards of washing your hair with cold water include the following: First, when washing your hair with cold water, the hair follicles on your scalp will shrink when it is cold, which is not conducive to washing off the oil and dirt in the hair follicles, while when washing your hair with hot water, the hair follicles will open, which is beneficial to washing off the oil and some dirt and avoiding dandruff. Second, washing your hair with cold water is irritating to the nerves of the scalp, and some nervous headaches are likely to occur after washing your hair. Third, wash your hair with cold water. The blood vessels in the scalp will contract violently after contact with cold water, and there may be symptoms such as headache, dizziness and black eyes. Fourth, if you wash your hair with cold water in the cold season, it may lead to cold invasion and colds.