Wisdom teeth are not recommended on the fifth day of menstruation. 1. Wisdom teeth are a difficult tooth to extract compared to other teeth in the mouth. Some buried wisdom teeth need to be cut and flipped and a small amount of alveolar bone removed before they can be extracted, which is a relatively invasive procedure. Some postoperative reactions, such as bleeding, pain, swelling, or systemic symptoms such as low-grade fever, may occur after wisdom teeth extraction, which varies from person to person. 2. On the fifth day of menstruation, the resistance is poorer during menstruation, and tooth extraction during this period may increase the postoperative reaction and increase the chance of infection. Antibiotics are needed to prevent infection after wisdom tooth extraction, and a few people using medication may also experience prolonged menstruation, or compensatory bleeding. Wisdom teeth extraction on the fifth day of menstruation is generally not recommended if it is not necessary, and it is recommended that it be done after menstruation.