Transient hematuria can be caused by pollen, chemical or drug allergies. Transient hematuria, or even carnal hematuria, can occur after strenuous exercise. Viral infections (such as the flu) can occasionally occur and are usually of no importance. Only repeated tests for true hematuria should be taken seriously and further tests should be performed. When hematuria is found, we should first determine whether it is true hematuria, that is, we should exclude pseudohematuria and red-colored urine caused by certain reasons, such as menstruation, hemorrhoid bleeding or bleeding from diseases near the urethra mixed with urine; the latter, such as exposure to certain pigments or internal rifampin and other drugs, as well as certain poisons (phenol, carbon monoxide, chloroform, snake venom), drugs (sulfonamide, quinine), crush injuries, burns, malaria, wrong type hemoglobinuria or myoglobinuria due to blood transfusion, etc. Transient hematuria can be caused by allergies to pollen, chemicals or drugs, and can also occur during menstruation, after strenuous exercise, and viral infections, and is generally of no importance. Patients with transient sarcoid hematuria should avoid eating alcoholic beverages in their diet; avoid eating high-protein foods; avoid eating fermented foods; the following foods are recommended to be eaten sparingly or not: 1. Tofu milk Bacterial change fermented foods. Beneficial to the growth rate of cysts. 2, animal offal The function of the liver is detoxification, many animal metabolism of toxins are left in the offal. Invisible to the kidneys to increase the burden and aggravate the disease. 3, soybean high protein food, avoid eating is to avoid the synthesis of nitrogen metabolites in the body, reduce the excretory power of the kidneys.