Picking things out of the teeth especially stinks, the reasons are residual food fermentation, dental calculus, caries and so on. 1. Residual food: the gap between the teeth to pick out things may be residual food after fermentation to produce a foul odor, can be removed by brushing and rinsing, flossing and other ways. 2. Calculus: The things in between the teeth may also be calculus, which should be scaled and removed in a timely manner. Normally, you should develop good oral habits, regular dental checkups and teeth cleaning. 3. Dental caries: If there is caries between the teeth, anaerobic bacterial infection can occur, resulting in a putrid odor. If the odor between the teeth is obvious, go to the hospital in time for examination and appropriate treatment.