It is not advisable to wash your hair during menstruation. Blood circulation is poor during menstruation. Washing your hair will concentrate blood on the head, making blood circulation in the womb worse. Menstrual blood cannot be drained smoothly, which can easily cause congestion and Causes dysmenorrhea. When you wash your hair, because the pores of your head are open, if you catch wind and cold at this time, it will easily lead to headaches. If you wash your hair at night or before going to bed, and do not fully dry your hair, the body's metabolism and resistance will decrease, and headaches will occur. More serious. Precautions for washing hair during menstruation: 1. Wash your hair with hot water, and blow dry your hair completely with hot air as soon as possible after washing. 2. It is best to wash your hair at noon. If there is no other way, avoid washing your hair before going to bed. 3. If you want to go out after washing your hair, wear a hat to avoid the wind. 4. It is best to avoid washing your hair for the first two days when menstruation is heavy, and only start washing your hair after the third day. 5. If you have severe dysmenorrhea symptoms, it is best not to wash your hair during menstruation.