You can wash your hair during menstruation, but the temperature should be appropriate. Avoid washing your hair with water that is too cold, as it can affect your menstrual cycle and the volume of your menstruation. You should also pay attention to your diet during menstruation, and try to eat less cold food, which may lead to increased menstrual flow, blood clots or menstrual pain. If you wash your hair at the right temperature, there is no effect. During menstruation, you need to keep your vulva clean, wash it every day and eat a well-digested liquid diet. You need to rest properly during menstruation, and you can eat more food to nourish your qi and blood.