Tooth extraction is the most common minor surgery performed in the dental department, but sometimes it can lead to accidents, causing undue losses and pain, and in severe cases, it can endanger lives. Therefore, regarding the question of whether teeth can be extracted for oral ulcers, patients should know the following before tooth extraction: Tooth extraction is contraindicated if one of the following conditions occurs: (1) Severe cardiovascular disease and high blood pressure above 180/100 mmHg of. Generally, patients with heart disease can have their teeth extracted as long as they have no symptoms of cardiac insufficiency (such as palpitations and shortness of breath when doing light activities or lying down). However, when extracting teeth, you should do the following: do not add epinephrine to the anesthetic to avoid tachycardia and induce heart failure; complete the anesthesia and move gently to minimize adverse stimulation, bleeding or damage; anti-infection precautions should be given before and after tooth extraction, because the heart The resistance of patients with the disease is reduced and they are more likely to be infected than normal people. (2) Bleeding diseases: For example, patients with hemophilia and idiopathic thrombocytopenic purpura have disorders in the coagulation process in the body, so they have a tendency to bleed. Bleeding after tooth extraction is difficult to stop, which can cause severe bleeding and be life-threatening. As for leukemia patients, infection is very easy to occur, and the wound after tooth extraction can also become an infection focus, leading to severe systemic infection that is difficult to control. Therefore, when these patients suffer from dental disease, they should receive conservative treatment and tooth extraction is contraindicated. Can you extract teeth if you have oral ulcers? Although ulcers will not affect tooth extraction, you will feel more uncomfortable. If the wisdom teeth are to be extracted, the operation may take a long time, and after the wisdom teeth are extracted, you cannot eat on the side where the teeth were extracted. If you have ulcers on the other side, it will definitely affect your eating. Extraction of other teeth is basically the same. You must wait at least 24 hours after tooth extraction before brushing and gargling. You should not eat anything too hard in the first few days, and you cannot eat on the side with the wound. It is best to wait until the ulcer is healed. (3) Menstruation, pregnancy, and lactation: In principle, women should avoid tooth extraction during menstruation, because compensatory bleeding may occur in the alveolar during menstruation. However, removing loose teeth during the menstrual period will not have much impact on the patient. Some "deep-rooted" teeth, such as impacted teeth or impacted teeth, should be removed after menstruation. Some people believe that teeth should not be extracted during pregnancy because it may lead to miscarriage. (4) Severe liver and kidney damage and active liver disease. Such as chronic hepatitis and cirrhosis. Due to poor liver function, the content of prothrombin and fibrinogen involved in the coagulation process is reduced, and there is a tendency to bleed. The wound after tooth extraction will continue to bleed. Therefore, before tooth extraction for such patients, an appropriate amount of vitamin K should be supplemented to promote the synthesis of prothrombin and supplement the deficiency of fibrinogen to avoid accidents.