Gynecological examination should not be done during menstruation because during menstruation the uterus is filled with blood and the endometrium is shed. If ultrasound examination is done to observe the endometrial condition it will affect the examination result. If routine leuko examination is done and the vagina is full of blood, taking the leuko at this time will affect the extraction and will easily affect the examination result because the leuko with lesions cannot be taken and most of them are menstrual blood. Taking the leukorrhea during menstruation will aggravate the chance of infection. Incomplete disinfection of the leukorrhea will easily bring bacteria into the vagina, which will multiply under the culture of menstrual blood and then enter the uterine cavity through the cervical opening, easily causing infection in the uterus. If gynecological examination is best performed 3-5 days after menstruation, it can reduce bleeding and also prevent gynecological infection. Do not perform gynecological examination during menstruation or when you are about to have your period, as the body’s resistance decreases during menstruation or before you are about to have your period, which can easily cause infection.