Teeth should not be extracted when blood pressure is high, because bleeding can be difficult to control when the blood pressure is high. Most of the bleeding after tooth extraction is done by compression or filling with gelatin sponge. When the blood pressure is high, the pressure in the patient’s blood vessels increases, and when the patient is nervous during the extraction, the blood pressure may increase further. Combined with the special structure of the gums, compression is not as easy to stop bleeding as other arteries in the body. Patients with hypertension should always monitor their blood pressure before tooth extraction, and should not extract teeth if their blood pressure is >150 mmHg. When the blood pressure is less than this value, it is safe to extract the tooth. If the patient’s blood pressure is too high at the time of tooth extraction, he or she can take rapid antihypertensive drugs such as nifedipine and captopril. Since most patients with high blood pressure take aspirin, they need to stop taking aspirin for at least a week before tooth extraction.