Bleeding after maxillary cyst surgery is generally considered to be caused by postoperative wound infection or secondary injury, and the details are analyzed as follows: 1. Postoperative wound infection: If the wound site touches water too early after maxillary cyst surgery due to improper care, it may lead to wound infection, with symptoms such as redness, swelling, heat, pain, etc., and may bleed after the infection is aggravated, but the amount of bleeding is usually not much. This situation generally need to be local trauma treatment with povidone-iodine for disinfection, and then need to follow the doctor’s instructions to use the appropriate antibiotics for treatment, such as amoxicillin, cefixime and so on. 2. Secondary injury: If the patient’s wound is impacted after surgery, it may cause secondary injury to the wound, which will lead to wound pain and bleeding. The wound should be sterilized with povidone-iodine. After maxillary cyst surgery, patients should take good care of the wound, avoiding premature exposure to water and bumps. Bleeding after maxillary cyst surgery is recommended to consult a doctor as soon as possible to find out the cause of the bleeding and treat it to avoid delaying the condition.