The diagnostic basis of chronic renal failure includes medical history, clinical symptoms, and laboratory tests. 1. Medical history: patients with chronic renal failure usually have a history of chronic kidney disease for 3 months or more. 2. Clinical symptoms: patients with chronic renal failure may have abnormal symptoms in various systems due to renal insufficiency. Abnormalities in the urinary system may cause proteinuria and electrolyte disorders; abnormalities in the digestive system may cause loss of appetite, nausea, vomiting, etc. Abnormalities in the cardiovascular system may cause palpitations (accelerated heartbeat, often accompanied by panic), shortness of breath and other symptoms. 3. Laboratory tests: Chronic renal failure can be diagnosed through laboratory tests, such as blood tests to diagnose renal function, ultrasound of the urinary system to diagnose the size of the patient’s kidneys, and so on, through which a comprehensive analysis and diagnosis can be made. If the above situation occurs, you should consult the doctor in time and improve the relevant examination under the doctor’s guidance to diagnose whether you are suffering from chronic renal failure.