Feeling tight teeth is usually caused by inflammation of periodontal tissues leading to swollen gums and tightness as follows. 1. The plaque and tartar attached to the teeth may lead to inflammation of the periodontal tissues under bacterial and mechanical stimulation, such as gingivitis and periodontitis. 2. Early lesions for gingival vasodilatation, inflammatory cells in the connective tissue infiltration, redness of the gums, bleeding on probing, with the development of the disease gingiva will appear obvious inflammation, edema. Periodontitis advanced periodontal abscess, inflammation infiltration is extensive, so that the tissue tension is greater, the pain is more obvious. If the above symptoms occur, it is recommended to go to the hospital in time, with the help of the doctor for early targeted treatment.