Anterior and posterior nostril obstruction

1. After the nasal cavity is blocked, there is still blood flowing from the nostril, and the bleeding cannot be controlled. 2. After nasopharyngeal fibrohemangioma or nasopharyngeal carcinoma surgery, the surgical cavity is blocked to stop bleeding. 3. In order to prevent blood from flowing into the lower airway during general anaesthesia or nasal sinus surgery, the nostril can be temporarily blocked during the operation, and there is no bleeding after the operation, and the blocked yarn ball can be removed.