The patient collects a urine sample, either at home or at a medical clinic. If possible, the first urine in the morning is collected. The sample is sent to a lab for analysis. Abnormal findings may indicate certain problems. For example, protein in the urine suggests kidney disease.
Sugar often indicates diabetes.
Certain substances indicate liver disease. A variety of problems cause bleeding in the urinary tract. White blood cells may indicate an infection in the urinary tract. Bacteria or yeast also indicate infection. Some abnormal findings are not caused by only one disease.