If your urine is still red the day after you eat dragon fruit, you need to go to the hospital for a routine urine test. If there are red cells or urinary occult blood in the urine routine, it should be considered that it is not related to eating dragon fruit, it should be caused by the carnal hematuria, need to further clarify the cause of the carnal hematuria, need to check the urinary ultrasound, to see if the patient has bladder stones, bladder tumor, or urinary tract infection and so on. If there are no red blood cells or urinary occult blood in the urine routine, this situation is still considered to be related to the red-colored urine caused by eating dragon fruit, which can be observed by continuing to drink more water and urinate more.