Chronic renal failure is mainly a disease that destroys the original function of kidneys due to a combination of different reasons in the body. Symptoms of chronic renal failure are as follows: 1. Weakness, vomiting, not wanting to eat. This is a phenomenon reflected in the early stage of the disease, which is mainly a digestive system disease, and some more serious ones may be accompanied by a series of oral diseases such as mouth ulcers. 2, weakness, drowsiness. Patients in the middle stage of the disease may suffer from early digestive problems, including mental depression, numbness and lack of strength, poor memory, higher blood pressure, anemia, bleeding gums, petechiae under the skin, and a series of blood problems. 3.Difficulty in breathing, dry and itchy skin. This is already serious some of the patients, when this situation suggests going to the hospital in time to seek medical attention. 4.Metabolic acidosis, water-electrolyte imbalance, hyponatremia, hypocalcemia and hyperphosphatemia, infection. This is already into the advanced stage of the condition, generally speaking the chance of developing into uremia is too great, you can carry out a series of conservative treatments such as chemotherapy to slow down the condition. In conclusion, chronic renal failure is a serious disease, if it is not detected and treated early, it may develop into uremia and other major diseases.