Bleeding twelve days after epiglottis cyst surgery may be related to postoperative infection and diet. It is recommended that the patient go to the hospital in time to review the electronic laryngoscopy and other tests to clarify the cause of the disease. 1. Postoperative infection: poor postoperative care leads to bacterial infection of the wound, causing inflammation. It leads to bleeding, and may also be accompanied by the appearance of foreign body sensation, discomfort, pain and other symptoms in the pharynx. Pay attention to oral hygiene care in daily life and keep your mouth clean and hygienic. Patients with infections can be treated with antibiotics or glucocorticoids. 2. Diet: The postoperative diet of epiglottis cyst should be based on light diet and soft liquid food. The postoperative diet is not avoided, and frequent consumption of spicy, stimulating, too hot, hard food may lead to wound damage and cause bleeding. Patients should manage their diet for one month after epiglottis cyst surgery. Bleeding after twelve days after epiglottis cyst surgery, patients are advised to go to the hospital in time for follow-up, checking electronic laryngoscopy, clarifying the cause of the disease and treating the cause.