Elderly people with generalized swelling and no urination may be caused by various renal diseases, cardiac insufficiency and other diseases, and it is recommended to consult a doctor in time. 1. Kidney diseases: such as acute nephritis, severe acute nephritis, nephrotic syndrome, lupus nephritis, acute interstitial nephritis and so on. Due to impaired renal function leading to impaired urinary excretion, fluid accumulation in the body, thus triggering the symptoms of generalized swelling and non-urination. 2. Cardiac insufficiency: it can be caused by myocarditis, cardiomyopathy, myocardial ischemia, pulmonary hypertension, hypertension, valvular lesions and other diseases. Due to the decline in cardiac excretion function, resulting in insufficient perfusion of the renal arteries, which triggers generalized edema without urination, patients may also be accompanied by dyspnea, loss of appetite, abdominal distension and other uncomfortable symptoms. There are many other causes of generalized swelling and non-urination in the elderly, it is recommended to seek medical advice in a timely manner, under the guidance of a doctor to identify the cause of the disease, and follow the doctor’s instructions for the appropriate treatment, to avoid blind judgment, so as to avoid delays in the condition.