The thinning of hair on the top of the head of girls may be related to malnutrition, stress, lack of sleep, excessive androgen secretion, etc., you can identify the causes and then use lifestyle adjustments, oral medication, topical medication, and hair transplantation in order to achieve recovery. 1. Malnutrition, stress and sleep deprivation: girls’ long-term picky eating, malnutrition, stress and sleep deprivation will affect the growth of hair, and should actively adjust their lifestyles to ensure adequate nutritional supply and sleep, and adjust their emotions to promote the growth of hair. 2. Excessive secretion of androgens: some women with thinning hair on the top of the head belong to androgenic alopecia, after consulting the doctor, you can take cyproterone under the guidance of the doctor to carry out treatment. You can also apply Minoxidil solution externally under the guidance of a doctor, apply it to the top of the head where the hair is thinning, and start applying it from the center of the affected area, which will help promote the growth of hair. Girls with thinning hair on the top of the head can go to the dermatology department of the hospital in time, according to the doctor’s advice to carry out the relevant examination and treatment.