Red urine is related to diet, trauma, urinary stones, kidney tumors and other factors, the color of urine and the degree of concentration of urine. Under normal circumstances, the human body excreted urine is yellowish, such as drinking too much water will appear colorless transparent urine, found that the color of urine red, indicating the existence of hematuria. There may also be a direct relationship with the diet, the diet to eat more pigmented foods, such as carrots, will lead to red urine color, is a normal physiological phenomenon, such as food to stop after the symptoms will be relieved. Many people due to the external force is large, will lead to trauma to the urinary system, local bleeding, will be discharged with the urine, resulting in reddish urine color, hematuria can be to the hospital for ultrasound examination of the urinary system. Because of the urinary tract stones, not only will lead to abdominal pain, the stone site capillary expansion, bleeding, there will be blood urine seen with the naked eye. Urine mixed with blood inside, no pain, consider the kidney tumor. The tumor grows more rapidly in the middle and late stages, which will lead to the rupture of the cancerous tumor, and at the same time, it will cause the blood vessels to rupture, so there will be hematuria manifestation.