Dry and frizzy hair can be caused by improper washing and care, nutritional deficiencies and other factors, which can be alleviated through daily care and a balanced diet. 1. Improper washing and care: If the dry and frizzy hair is caused by improper washing and care or excessive perming and dyeing, you should avoid excessive cleaning, perming and dyeing of the hair in your daily life, and at the same time, you should choose mild washing and care products, so as not to aggravate the dry and frizzy hair situation. 2. Malnutrition: Malnutrition may also lead to dry and frizzy hair, patients should ensure that their diet is reasonable, ensure balanced nutrition, do not picky about food, partiality, if necessary, follow the doctor’s advice to supplement vitamins and trace elements. If the hair is dry and frizzy, accompanied by hair loss and breakage, itching and other discomforts, it is recommended to go to the regular hospital for examination to clarify the cause.