Bleeding caused by drinking water after wisdom tooth extraction is mostly caused by drinking water too hot or too fast, resulting in dislodging of clot in the tooth extraction wound. You should bite the cotton roll again to stop bleeding after local disinfection; if the effect is not good, you should consult a doctor in time, and give local suture to stop bleeding, medication to stop bleeding, and so on. 1. Wisdom tooth extraction is a kind of more complex extraction surgery, surgical trauma is relatively large, the operation time is longer, and more postoperative compression hemostasis or suture hemostasis. Doctor’s advice 2 hours after surgery can drink water and eat, into the warm, soft food, avoid too hot and hard food. 24 hours after the operation, prohibit brushing and rinsing, in order to protect the blood clot in the extraction wound, and promote the healing of the extraction wound. 2. If you drink water too fast and too hot after wisdom tooth extraction, it will easily cause the blood clot in the extraction wound to fall off and bleeding will occur. At this time, can be local disinfection after biting the cotton roll again compression hemostasis, generally half an hour after the bleeding can be stopped in a timely manner. If the effect is not good, you should immediately seek medical attention, by the physician to give local suture pressure hemostasis or iodoform gauze stuffing hemostasis and so on. After wisdom teeth extraction, we should strictly follow the doctor’s instructions for oral care, warm, soft diet, to prevent infection and bleeding. If any discomfort occurs, you should consult a doctor for symptomatic treatment under the guidance of a physician.