Feel the teeth gap has a foreign body sensation can first use dental floss cleaning, if after cleaning the person is still no better recommended to the hospital treatment. 1. Flossing. Teeth gap has a foreign body sensation, you can first use their own dental floss, gently clean the teeth adjacent to the gap, to remove the embedded material and food debris. 2. Go to the hospital. If there is no improvement after flossing, you need to go to the hospital according to the oral condition and X-ray examination, there may be hidden cracks or foreign objects embedded in the teeth, hidden cracks need to be considered according to the size of the cracks after the preparation of the cavity resin bonding, or crown restoration. In the case of foreign body impaction, it is necessary to use instruments such as probes and be examined by a doctor. If you feel that you have a foreign body sensation in your teeth and cannot floss on your own, it is recommended that you go to the hospital in time to have your oral cavity examined and dealt with by a doctor.