Blood and urine tests are best performed on an empty stomach, mainly because urine tests require fasting, leaving morning urine for the most accurate test, and diet has little effect on blood tests. These two tests represent different meanings, for example, blood tests can be used to assess inflammatory infections in the body and to assess whether there are problems such as anemia. Urine routine can be used to detect early kidney disease and to diagnose diseases such as urinary tract infections. If the corresponding indicators are abnormal, targeted treatment should be carried out according to the specific condition. If the patient has positive urine protein occult blood, it is often related to nephritis, nephrotic syndrome and other diseases, which require targeted application of some kidney-protective drugs to prevent the deterioration of the condition. Usually pay attention in life, not to stay up late, overworked.