If the false-positive fecal occult blood is caused by eating pig’s blood and other foods, and there is no other pathology, the diet does not need to pay attention to anything; if it is caused by gastrointestinal bleeding, the active bleeding should be fasted with water, and then gradually return to a normal diet from a liquid diet according to the doctor’s advice after the bleeding is stabilized. 1. False-positive fecal occult blood may occur if blood products such as pig’s blood and duck’s blood are eaten before the examination. If it is caused by eating, no gastrointestinal lesions bleeding, stop eating these foods, after a few days and then check the test results show negative, this situation is a physiological phenomenon, generally can eat anything, diet does not need special attention. 2. Positive fecal occult blood may also be caused by gastrointestinal bleeding, if you consider active bleeding, when the amount of bleeding is more, you should fasting water, after the bleeding is stabilized, and then according to the doctor’s instructions from the liquid diet gradually return to normal diet, and should avoid non-steroidal anti-inflammatory drugs, hormones and other drugs, such as aspirin, methylprednisolone, and so on. Avoid spicy stimulation, tobacco, alcohol, strong tea and coffee. If you have positive fecal occult blood, exclude diet and other physiological reasons, if accompanied by other symptoms of discomfort should promptly consult a doctor, under the guidance of the doctor for treatment, so as to avoid delaying the condition. At the same time, pay attention to dietary care.