Urine pH 8.0 indicates that the urine is alkaline, alkaline urine may be physiological reasons mainly due to excessive intake of alkaline food, pathological reasons include urinary system diseases, metabolic disorders, drugs and other factors. 1. Physiological reasons: most plant foods are alkaline, if a large amount of plant food intake may lead to excessive secretion of gastric acid, acid secretion is reduced, the urine may be alkaline. 2. Pathological causes (1) Urinary infections: such as cystitis, pyelonephritis, etc., when the bacteria decompose urea, forming ammonia, because ammonia is alkaline, so it will lead to alkaline urine. (2) Metabolic disorders in the body: when metabolic disorders occur in the body, resulting in the metabolic process of acidic substances decreased, alkaline substances increased, will also appear to make the urine alkaline, and in severe cases, alkalosis can occur. (3) Drug reasons: such as taking sodium bicarbonate drugs, may make the urine alkaline. Alkaline urine can also be seen in other causes, it is recommended to go to the regular hospital for examination, under the guidance of the doctor for treatment.