If you eat red dragon fruit, the stool is likely to turn red. Because red dragon fruit has a large amount of red natural pigment, anthocyanin, and the stomach does not absorb natural pigment, and this pigment can be dissolved in water. So the natural pigment can only be excreted with the excrement, so there will be the situation of red stool. But this is a normal phenomenon, as long as you stop eating dragon fruit 1-2 days, the reddening will disappear. But if you eat ordinary dragon fruit, and the situation of red stool, it may be due to blood in the stool. Dragon fruit has a laxative effect, blood in the stool may be due to too much diarrhea, and cause the stool to turn red. If this is the case, you can take haloperidol for treatment, but if the redness of the stool is not due to eating too much dragon fruit, you need to go to the hospital for examination and treatment in a timely manner.