Hematuria, the cause of which cannot be detected, may not be pathologic and is usually associated with insufficient water intake, strenuous exercise, and nutritional deficiencies. In addition, the very early stage of urological tumors often cannot be detected in time due to the limitation of examination means. 1. Insufficient drinking water: drinking little or no water for a long time may lead to excessive consumption of water in the body, and not timely replenishment will increase the concentration of urine, which is easy to appear blood in urine, cloudy urine and so on. It is recommended to drink proper water every day and try to keep it around 2000ml. 2. Strenuous exercise: in the process of doing strenuous exercise is likely to be due to contusion and cause transient hematuria, but currently no symptoms such as lumbago, lumbago, and no substantial lesions, stop strenuous exercise and symptoms can be relieved. 3. Nutritional deficiencies: For example, a prolonged lack of vitamin K may affect the body’s blood clotting, thus causing hematuria. However, a small amount of deficiency is generally not serious, through the urine routine examination can not be found related to the cause of the disease, a large number of patients lack of vitamin K, need to comply with the doctor’s advice to supplement vitamin K in a timely manner. If the cause of hematuria can not be found, you can first observe, and it is recommended to follow up on time, if other accompanying symptoms should be promptly consulted to clarify the cause.