Red urine after eating dragon fruit, by drinking more water and urinating a few times, usually does not last more than 24 hours. Red dragon fruit is rich in anthocyanins, which cannot be completely decomposed and absorbed after entering the body, and can be excreted through urine or stool, so the situation of red urine will appear, which is a normal phenomenon. By drinking more water and urinating more times, the early metabolism of anthocyanins can be promoted, and the color of urine can be restored to normal, usually not more than 24 hours. It should be noted that if red urine is accompanied by abdominal pain, nausea and vomiting, frequent urination, urgent urination and painful urination, the effect of dragon fruit consumption can be ruled out and the presence of urinary tract lesions, such as urinary stones, urinary tract inflammation, urinary tract tumors, etc., should be considered. If you drink and urinate frequently and your urine is still red after 24 hours, it may suggest a problem of hematuria, and you need to seek medical examination and treatment early.