A positive leukocyte esterase indicates inflammatory lesions because leukocyte esterase is present only in neutrophils, which are the largest group of blood cells, and the physiological function of neutrophils is to swallow bacteria, which are the guardians of human protection. Under normal conditions, the number of leukocytes in the vaginal microecology should not be greater than 5 per high-powered microscopic field, then leukocyte lipase should be negative at this time, while a positive result indicates a large increase in neutrophils, which are inflammatory cells, so a positive result indicates an inflammatory lesion in the vagina.