The first one is that a dialysis patient may die suddenly without any symptoms, such as a patient with massive cerebral hemorrhage, myocardial infarction, etc. The patient may quickly develop a coma and a drop in blood pressure, leading to death. Second, if a dialysis patient gradually appears to die, the manifestations include: 1. there may be such manifestations as general wasting and malnutrition. 2. the patient is poorer in spirit, appears depressed, and the state of consciousness gradually changes from lucid to comatose. 3. the dialysis patient may appear to breathe deeply or have a gradually slowing heart rate and gradually decreasing blood pressure before death. 4. the patient may have gastrointestinal symptoms, such as vomiting blood, black stool or diarrhea.