The color of urine is a little red, possible causes: first, drugs or food staining, such as oral rifampin can lead to red urine color, or taking food containing red pigment, then the urine may make a transient red staining. This situation only needs to stop the relevant drugs and food, urine color can be turned back to a clear color, no special treatment. Second, inflammation of the urinary system and stones, resulting in hematuria of the naked eye. When stones or inflammation co-exist, it can cause local mucosal damage, congestion and edema, and a small amount of blood can be mixed into the urine, resulting in red urine color, accompanied by urinary frequency, urinary urgency, painful urination and other symptoms. It is recommended to further investigate urine routine and urinary system ultrasound to exclude related diseases. If infection is present, anti-infection treatment is recommended. If stones are present, extracorporeal lithotripsy or surgical treatment is needed. After curing the primary disease, the urine color can be changed to clear color. Thirdly, urinary tumors, which are common in elderly patients, usually do not have obvious pain and simply see red urine color.