Tooth gap pain may be related to food impaction, or it may be caused by dental caries, gingivitis, pulpitis and other reasons. 1. Food impaction: If there is food impaction between two teeth, which cannot be removed for a long time, it will probably cause gingivopapillitis, which will cause gap pain. 2. Dental caries: If there are dental caries among the teeth, the gingival tissues will be damaged due to dental caries, which will cause gap pain, and may be accompanied by bad taste in the mouth, alveolar abscess and other symptoms. 3. Gingivitis: usually caused by inflammation of the gum tissue due to plaque, under the stimulation of inflammation, it can involve the periodontal tissues and gums, which may cause tooth gap pain, accompanied by abnormal tooth color, bleeding gums and other manifestations. 4. Pulpitis: due to the existence of inflammatory reaction in the pulp tissue, stimulated by inflammatory products, may cause gap pain, especially after being stimulated by hot and cold, the pain symptoms are significantly aggravated. Teeth gap pain, may also be caused by other reasons, if the symptoms continue to be unable to alleviate, it is recommended to seek medical attention as soon as possible, after clarifying the cause, to give targeted treatment.