Red urine often indicates the possible occurrence of hematuria. Also some food intake such as dragon fruit can cause red urine, which should be ruled out. Hematuria is one of the most common symptoms of the urinary system and is divided into visual hematuria and microscopic hematuria. There are many causes of hematuria, such as urinary stones, tumors, inflammation, trauma, glomerulonephritis, nephrotic syndrome, etc. In the case of finding red urine or physical examination of urine routine suggesting microscopic hematuria, the first step is to identify the cause and treat it symptomatically. Generally speaking, if accompanied by a large amount of meatus hematuria, it is recommended to drink a lot of water in order to prevent the production of blood clots and cause difficulty in urination. Antibiotics can be taken appropriately with cleansing and diuretic drugs to avoid the formation of blood clots and prevent the occurrence of infection. For different causes, hematuria caused by urinary stones is often accompanied by pain, and hematuria caused by urinary tumors is usually painless carnal hematuria throughout, which requires early screening, clear diagnosis and timely surgical treatment. To sum up, except for individual foods and fruits that cause infrared urine color, we should be alert to the occurrence of blood in urine, and we must go to the hospital in time to do relevant tests to exclude and clarify whether it is hematuria and treat it in time.