A more effective way to determine whether there is blood or red food in the stool is the fecal occult blood test.
Many times there will be a phenomenon of red stool, such as eating red dragon fruit, red amaranth, etc. If there are anal and intestinal diseases, there will also be a phenomenon of red stool, such as peptic ulcer, colorectal cancer, hemorrhoids, fissures and so on.
Under normal circumstances, the stool is not red, if you find that the stool is red, you have to distinguish whether it is caused by eating colored food or intestinal diseases, usually it is difficult to distinguish the difference between the two with the naked eye, this time you can choose the fecal occult blood test to identify the two.
Fecal occult blood test can detect the blood content in the stool. If the color of the stool changes due to eating colored food, the result of the occult blood test is negative; if there is blood in the stool, the result of the occult blood test is positive. It should be noted that blood products such as pig’s blood and duck’s blood may also lead to false-positive fecal occult blood test, which should be judged together with gastroenteroscopy and other examinations.
If you find that the color of the stool changes, it is recommended to go to the hospital as soon as possible to identify the cause of the disease and treat the symptoms.