Extraction of teeth during menstruation may affect the bleeding, pain aggravation, infection and so on. 1. Bleeding: During menstruation, the blood clotting function may be reduced due to the influence of hormone levels in the body, and the trauma is not easy to form blood clots after the operation, and the brittleness of blood vessels is increased, and bleeding is more frequent, and dry socket syndrome or postoperative bleeding may occur. 2. Increased pain: the body is more sensitive to pain during menstruation, and the pain may increase if teeth are extracted. 3. Infection: During menstruation, the body’s resistance is relatively poor, and the ability to resist infection is relatively poor, so bacteria can easily invade the wound of tooth extraction, and post-extraction infection may occur. In order to avoid a series of reactions after tooth extraction, menstruation is a contraindication to tooth extraction; if the tooth must be extracted, it is recommended to go to a regular hospital for safer.