To do a stool test of fecal occult blood(FOB) is an effective way to figure out the condition of stomach. The guaiac assays is a common method but the patient’s diet will have an effect on the accuracy. Some biologicall companies have launched new stool test kits which can detect the low level of the FOB in stool. In addition, the double antibodysandwich assay is also applied to the test.So do the test as soon as possible if you have the symptoms or any suspection