People suffering from chronic renal failure will show different symptoms at different stages of the disease. 1. The early digestive symptoms of patients are a slight loss of appetite, nausea accompanied by vomiting, ulcers in the mouth and tongue (mistakenly thought to be caused by fire), a foul taste in the mouth and bleeding. 2. The most common symptom of the hematological system in patients with uremia is anemia. Parts of the body are prone to bleeding, which is due to the destruction of platelets inside the body, and may also be caused by toxins in the body. In this case, dialysis may be done. In addition to this, sometimes the number of white blood cells will be abnormal, like the number is significantly reduced, and the antibacterial ability will be lower than normal, and the patient will be prone to infections. Changes occur in the cardiovascular system, and the high blood pressure caused by uremia causes eighty percent of patients to suffer from varying degrees of hypertension, a condition that causes a variety of conditions such as left ventricular hypertrophy and heart failure. There is also heart failure due to water and sodium retention, hypertensive heart disease, etc. In advanced cases, pericarditis may also develop. 3. The neurological and muscular systems may also suffer from different degrees of pathology. Patients may also suffer from renal bone disease, whose clinical manifestations are mainly fractures. Lesions in the respiratory system can easily lead to pneumonia and bronchitis. Endocrine dysfunction is mainly divided into two conditions: endocrine disorders occurring in the kidney itself and endocrine disorders occurring in the periphery. Severe lung infections and body fever occur. The symptoms of kidney failure in different periods of time depend on the patient’s physical condition, and when the body is abnormal, it is important to hurry to the hospital.