Pain between teeth may be caused by gingivitis, dental caries, chronic periodontitis. 1. Gingivitis: If there is inflammation of the gum tissue at the gap between the teeth, the general symptoms will be manifested as bleeding gums, the shape of the gums as well as changes in the color and texture of the gums, and there will be a vague, dull pain, which is worse when you eat. 2. Dental caries: it is possible that the teeth at the gap in the teeth caries, caries part may be due to frequent food congestion caused by, and with the deepening of the caries, the pain is more and more obvious, usually manifested as white or yellow-brown spots on the teeth, cold, hot, sweet, acidic food sensitivity, when the food into the hole in the pain is obvious. 3. Gum recession, age-related changes or periodontal disease leads to gum recession root exposure, when eating too cold and acidic food will appear gap or tooth pain, the pain lasts for a short time will disappear. The pain between the teeth, it is recommended to go to the hospital stomatology treatment, usually pay attention to careful brushing, keep the mouth clean.