After eating dragon fruit urine may be red, generally is a normal phenomenon, but at the same time need to be alert to other causes of red urine. Eat a lot of dragon fruit, especially red dragon fruit, because dragon fruit contains a lot of anthocyanins, after entering the body, through the kidney filtration, accompanied by urine, will lead to reddish urine, but in the urine routine test, there are no red blood cells in the urine, and there are no other clinical symptoms. Reddish urine may also be related to other physiological factors, such as menstrual blood contamination, urine drug factors. Red urine, excluding physiological factors, may be the presence of disease factors, such as urinary tract infections, urinary tract stones, urinary tract tumors, etc., may also be accompanied by frequent urination, urinary urgency, urinary pain, urination difficulties and other symptoms. Red urine and other abnormalities, it is recommended to consult a doctor for examination and treatment.