It is not recommended to wash your hair every day, if you wash your hair every day, for oily skin, it will lead to an increase in sebum compensatory secretion, thus causing dandruff and other conditions, it is recommended to wash your hair 1-2 times a week at ordinary times. If the hair is greasy, you can usually eat more fresh vegetables and fruits, avoid eating large doses of spicy and irritating food, greasy food and sweet food, which can reduce the oil secretion of the scalp. You can also take zinc preparations and B-complex vitamins to help reduce the secretion of scalp oil. If the scalp itself is dry, washing your hair every day is more likely to result in chaffy dandruff. It is recommended to use weakly acidic to neutral shampoo products, such as those with a pH value of 5-7.0. It is also not recommended that the temperature of the water used for shampooing be too high, but controlled to be similar to body temperature.