The test for acetone in the urine is an analysis that helps determine the level of ketone bodies in the urine. Ketone bodies include metabolic products (acetoacetic, beta-oxybutyric acid, acetone), which are formed in the liver and excreted by the kidneys. Normally, ketone bodies are not detected in the urine. If their level in the urine increases, acetonemia develops (a large amount of acetone and acetoacetic acid in the urine). The accumulation of ketone bodies leads to the occurrence of acetonemic syndrome. Acetone in a child's urine is quite common. Its cause can be temporary metabolic disorders and serious chronic diseases. Various factors can trigger an "acetonemic crisis": stress, overtiredness, overexcitement, a long trip, nutritional errors, acute respiratory diseases. Primary acetonemic syndrome is caused by errors in the diet. For example, when the child's diet contains a lot of sweet, fatty foods, food containing preservatives and dyes. Secondary acetonemic syndrome occurs as a result of various diseases that have not yet been detected in the child. It can be liver damage, diabetes, brain tumors, thyrotoxicosis. As a result of acetonemia, the child has severe vomiting, breathing and urine with the smell of acetone. The reason for this condition is a violation of fat metabolism and carbohydrate assimilation processes.