Uremia actually refers to the inability of the human body to produce urine through the kidneys to excrete the waste products and excess water produced by metabolism in the body, causing poisoning. Modern medicine believes that uremia is a series of complex syndromes caused by the disorder of the biochemical process in the body after the loss of renal function. Rather than an independent disease, it is called renal failure syndrome or renal failure for short. This term was proposed by PIORRY and HERITER after they described renal failure in 1840. The causes of uremia include: chronic glomerulonephritis, chronic pyelonephritis, renal tuberculosis, renal arteriosclerosis, urinary tract stones, prostatic hypertrophy, bladder cancer, lupus erythematosus, diabetes, etc.