The color change of urine after eating red dragon fruit is generally normal, if the kidney function is normal, most of them can return to normal after 1 day. Red dragon fruit contains natural pigments, which are not easily absorbed by the body and need to be excreted through urine and stool. If the kidney function is good, you can metabolize the pigment by drinking more water and stimulating urination, and you can usually resume normal urination after 1 day. When drinking water, you need to pay attention to try to drink in small sips, 30-50ml each time, and it is not recommended to drink a large amount of water at one time to avoid aggravating the kidney function. If the kidney function is abnormal, the recovery time will be relatively longer. The natural pigment in red dragon fruit has little effect on the body, no need to worry too much, just pay attention to drink more water. If there is still red color in the urine after eating dragon fruit for more than 2 days, you should promptly go to the urology department of the hospital to rule out disease factors.