The normal value of urine pH, which is the pH of urine, is between 4.5 and 7.9. That is, the normal urine pH is weakly acidic, neutral or weakly alkaline. Urine pH is related to a person’s eating habits and drinking water: for example, if some people like to eat chicken, duck, fish and meat, mainly animal food, then their urine is acidic and has a lower pH. In addition, if one exercises vigorously or is in a state of hunger or sweating profusely, the pH of urine will also be lowered and it will be acidic. If the urine is alkaline, it has a pH value of >6. Patients with some diseases, such as diabetes, gout or stones, generally have acidic urine. If there are infected stones, the urine will be alkaline, and there are also urinary tract infections caused by pyelonephritis or Aspergillus, which are alkaline urine.