The possible reasons for having yellow soft stools but positive occult blood include eating blood products, gastrointestinal bleeding, gastrointestinal tumors, etc. Patients should seek medical attention to clarify the cause of the disease and take medication and surgical treatment. 1. Eating blood products: Try not to eat blood products, meat, etc. three days before the test to avoid false positives. When the test is positive in this case, it is recommended to repeat the test after an interval of 3-5 days. 2. Gastrointestinal bleeding: gastric ulcer, duodenal ulcer and other causes of gastrointestinal bleeding can also lead to positive fecal occult blood, if the amount of bleeding is small feces can still be yellow to the naked eye. If bleeding lesions are suspected, patients should undergo further examination to clarify the cause. For example, proton pump inhibitors such as omeprazole and gastric mucosal protectors such as aluminum-magnesium combination can be used. Patients who clearly have ulcers and combined with Helicobacter pylori need to be treated with Helicobacter pylori eradication. 3. Gastrointestinal tumors: malignant tumors of the digestive system can also cause bleeding by destroying the mucosa through invasion, and those with a clear diagnosis should be treated with surgery and chemotherapy under the guidance of doctors. In conclusion, the positive occult blood test of stool is relatively sensitive, generally 5ml and above bleeding can be shown as positive result, but at this time, it may not necessarily appear obvious bloody stool or black stool. Positive occult blood test suggests timely consultation to avoid serious consequences.