Fecal occult blood is weakly positive, indicating that the amount of bleeding is not much, whether it is serious or not needs further examination to clarify the cause of the disease before judging. If it is related to gastroenteritis, peptic ulcer, gastrointestinal polyps, hemorrhoids, parasites, etc., the condition is not serious; if the fecal occult blood test is weakly positive for a long period of time, it can not be excluded from the digestive tract tumors, and at this time the condition is more serious. Fecal occult blood test is mainly to observe whether there is blood in the feces, weak positive occult blood indicates that the amount of bleeding is not much, if it is due to gastroenteritis, mild hemorrhoids, peptic ulcer, gastrointestinal polyps, etc., gastrointestinal mucosal damage, which will lead to gastrointestinal wall of the slight bleeding, at this time when the amount of bleeding is less, the occult blood test was weakly positive, does not belong to the seriousness of the situation. When the occult blood test is strongly positive and the blood is visible to the naked eye is more serious; or the long-term fecal occult blood test is weakly positive, then we need to consider the occurrence of gastrointestinal tract tumors, such as colon tumors, gastric tumors and so on, and at this time the condition is also more serious. When the patient has this situation, it is recommended to complete the relevant examination as soon as possible, to clarify the cause of weakly positive fecal occult blood test under the guidance of professional physicians, and to assess the severity of the disease.