The main reason for bleeding teeth due to high blood pressure is that when the blood pressure is too high, the pressure of the blood in the capillaries of the gums increases, which causes the capillaries to rupture and bleed because of the increased blood pressure, which is the main cause of bleeding teeth. There are other reasons for high blood pressure to cause tooth bleeding, but this is not the main reason, but if there is gum calculus, it also tends to cause bleeding. Patients without gum calculus do not have bleeding gums even if their blood pressure is high. Patients who have bleeding gums often have gum calculus first, and when their blood pressure is too high they tend to have bleeding gums. When the blood pressure is too high it will not only cause gum bleeding, but in serious cases it will also lead to bleeding from the fundus of the eyes, which is the most serious and can easily lead to blurred vision or visual impairment, so patients with high blood pressure must keep their blood pressure below 160 mmHg.