For sudden nasal bleeding, you can pinch the cartilage of the nose bilaterally with your thumb and index finger, while lowering your head and opening your mouth, and apply cold compresses to your forehead and neck. If there is no obvious coagulation dysfunction, most cases will be gradually relieved in 5-10 minutes, after which you can gently blow out the blood clots from the nasal cavity and avoid strenuous activities. Generally, if bleeding does not occur again within 4 days, it is able to improve significantly. For those who still have a large amount of blood spitting out from the mouth after pressing the nose, they should go to the hospital as soon as possible to improve nasal endoscopy, observe the whole nasal cavity from front to back, look for the bleeding site, and then do nasal cavity stuffing or electrocoagulation to stop the bleeding. If there is a combination of hypertension and arteriosclerosis, the symptoms of nasal bleeding should be actively treated symptomatically to get effective relief. During the treatment period, a semi-liquid diet should be the mainstay, avoid strenuous activities, and do not take long hot baths or wash your hair.