Severe hair loss in girls may be caused by physical stimulation, inflammatory factors, and androgenic hair loss. It can be regulated through daily care and medication. 1. Physical irritation: frequent use of harsh shampoos, unsuitable conditioners, and hair dyeing and perming can cause irritation to the scalp and hair, leading to massive hair loss. It is recommended to combine your hair quality, choose the right shampoo and conditioner, and reduce the number of hair dyeing and perming, which can reduce hair loss. 2. Inflammatory factors: Bacterial and fungal infections of the scalp are also a major cause of hair loss. It is recommended to go to the dermatology department of the hospital for a clear diagnosis. For hair loss caused by bacterial infection, it is recommended to give erythromycin and fusidic acid ointment. Hair loss caused by fungal infections can be treated with antifungal drugs such as ketoconazole and miconazole nitrate. 3. Androgenic alopecia: androgenic alopecia is related to heredity, and can be given under the guidance of a doctor, minoxidil tincture topical application, can promote hair growth. Hair loss is serious, it is recommended to pay attention to, in addition to daily life and dietary care, it is recommended to timely to the hospital, under the guidance of the doctor standardized treatment, to promote recovery.