Teenage hair loss is usually a normal physiological phenomenon if there is no reduction in hair volume. Hair growth is usually cyclical, under normal circumstances, hair growth to a certain extent will appear physiological shedding, and teenage hair loss and new hair growth can generally be in dynamic balance, so if teenagers appear hair loss can maintain a normal amount of hair, often belong to the normal physiological phenomenon. However, if teenagers have excessive hair loss and significantly reduced hair volume, it may be pathological hair loss, there are many reasons for pathological hair loss, teenagers mostly due to stressful school work, lack of sleep, hair dyeing and perming, etc., resulting in hair loss, at this time to improve living habits, relieve stress, generally can gradually recover; other diseases such as genetic hair loss, hair follicle dysplasia, anemia, malnutrition, scalp infection, etc. can also occur. Other diseases such as genetic alopecia, hair follicle dysplasia, anemia, malnutrition, scalp infection, etc. can also appear hair loss, usually with a family history of disease, pale skin mucous membrane, thinning, itchy and painful scalp and other symptoms, it is recommended that patients seek medical attention in a timely manner to clearly correct the cause of the disease to improve the symptoms of hair loss. If the situation is more serious, patients can take oral medications, such as finasteride or topical minoxidil tincture at the scalp and other drugs, to relieve hair loss has a certain effect; drug treatment effect is not good can also consider hair transplant surgery to increase the amount of hair. It is recommended that adolescents try to reduce the stimulation of scalp such as hair dyeing and perming, avoid spicy, stimulating and greasy food, improve bad habits such as staying up late, maintain moderate hygiene of the scalp and maintain a good state of mind, which can alleviate the symptoms of hair loss to a certain extent.