Hair dyeing is not advocated during menstruation. All hair dyeing agents are chemical substances, and all chemical substances may cause a decrease in body resistance when used during menstruation. Therefore, it is not recommended to use hair dyes during menstruation, let alone any substances that are harmful to the body. During the menstrual period, pay attention to rest and a reasonable diet and pay attention to the intake of eggs, milk, chicken, fish, lean meat and other high-quality protein, which can strengthen the body’s resistance. Pay attention to eating more fruits and vegetables rich in vitamin C, which can soften blood vessels and reduce the incidence of atherosclerosis. Avoid strenuous exercise and heavy physical activities during menstruation to prevent and control increased menstrual flow.