Low blood pressure after intestinal polyp surgery may be due to blood loss during surgery, anesthesia medication, stress reaction and so on. 1. Blood loss: If the patient loses too much blood during surgery, the decrease of systemic blood volume may lead to low blood pressure. At this time, through timely rehydration or hemostatic drugs, the condition can gradually improve after the bleeding stops. After the operation, we should pay attention to the changes of blood in the stool. 2. Anesthesia drugs: some anesthesia drugs such as propofol have vasodilating effect, during the time of drug action, the patient may have low blood pressure, with the gradual metabolism of the drug, the low blood pressure situation can usually gradually improve. 3. Stress reaction: If the patient has basic diseases or is too old, the surgery may lead to acute stress reaction, which can also be manifested as lower blood pressure. It is recommended that the patient communicate with the doctor in a timely manner, under the guidance of the doctor targeted treatment.