shake the stock solution of Gleditsia sinensis and dilute it with boiling water (the proportion of stock solution depends on the length of hair), heat it to a suitable temperature, scrub the hair roots with a small cotton cloth several times and massage with your fingers at the same time, then rinse it with water for three minutes to make the scalp fully absorbed, without washing it again. Liquid medicine is irritating to eyes, so it should be avoided to enter eyes! It is best to cover your eyes with a towel. If the liquid medicine enters your eyes, please rinse it with clear water in time.