Hello, it is not good to bathe and wash your hair with cold water in summer, because the temperature will be higher in summer. At this time, bathing with cold water is more stimulating to the body, and you may catch a cold, have a headache and feel dizzy. Bathing in cold water will shrink when stimulated. At this time, the heat removal effect is not very good, and it will still be very hot after taking a shower. Therefore, it is recommended to take a bath with warm water with appropriate temperature. It is hot every day in summer, sweating will be more, and bacteria are easy to breed.