If dry and frizzy hair is caused by malnutrition, it is necessary to strengthen nutrition; if it is caused by iron deficiency anemia, medication should be used; if it is caused by frequent perming and dyeing of hair, it is necessary to avoid shampooing every day, and to strengthen care. 1. Excessive weight loss or pathological malnutrition, need to strengthen the nutrition, the formulation of a reasonable and balanced diet. 2. Iron deficiency anemia caused by, can take iron under the guidance of the doctor, such as ferrous sulfate, ferrous succinate and so on. 3. Frequent perming and dyeing of hair can also lead to dry and frizzy hair, you should avoid washing your hair every day, frequent improper cleaning of hair will take away the oil, as little as possible dyeing and perming of hair, do not scrub hard when washing hair. Regular hair care, the use of hair care oil and other hair protection. Usually pay attention to sunscreen, reduce the damage of ultraviolet rays on the hair. It is recommended that patients with long-term dry hair go to a regular hospital for treatment, after a clear diagnosis and symptomatic treatment.