The signs before death of renal failure in the elderly may manifest as severe shortness of breath, coma, panic, etc. Kidney failure, especially uremia, can involve many organs throughout the body, resulting in death due to reduced function of the corresponding organs. The more commonly involved organ is the heart, which can manifest itself as severe heart failure, and the patient will have especially severe shortness of breath, sometimes so severe that he cannot lie down and must sit in a sitting position. The recurrence or persistent aggravation of heart failure can lead to death. Many patients with renal failure have high blood pressure, and cerebral vascular sclerosis will also strengthen, so it is easy to have brain hemorrhage, some patients with brain hemorrhage will be in coma, brain hemorrhage is a very common cause of death of patients. Patients with uremic kidney failure are prone to hyperkalemia, which is most likely to affect the heartbeat, and patients will show severe panic attacks, and some patients will have convulsions and die.