Promote the growth of thick hair, first of all, pay attention to strengthen the nutrition, and secondly, pay attention to strengthen the care, if necessary, can use medication to promote the growth of hair. 1. Strengthen nutrition. Hair growth and other tissues need a lot of nutrients, when the lack of nutrition, aging growth rate will gradually slow down, in the case of adequate nutrition, hair growth rate and the number will gradually increase. 2. Strengthen care. Scalp hygiene and daily care of the scalp will directly affect the physiological function of the hair follicle, thus affecting the growth rate of hair. In daily life, we should try to keep the scalp clean, and avoid the use of stimulating hair dyes, shampoos and so on. 3. Medication. Androgenetic alopecia, baldness and postpartum alopecia can lead to thinning hair, in which case medication is needed. For example, androgenetic alopecia can be treated with oral finasteride tablets (for men), spironolactone tablets (for women), and topical minoxidil tincture to promote the growth of hair and make it thicker. As the cause of hair loss varies from person to person, the treatment may also vary, and the specific situation requires an interview with a doctor before choosing the appropriate treatment.