After a toothache on the gums grow a bag without pain, may be wisdom teeth pericoronitis, chronic apical periodontitis, chronic periodontal abscess. 1. Wisdom tooth pericoronitis: wisdom tooth pericoronitis after local rinsing and medication will disappear, the gums will bulge but not painful. 2. Chronic periapical inflammation: acute periapical inflammation of the tooth is not treated in time, chronic periapical abscess will be formed, the abscess through the gingival mucosa pus discharge, the formation of gingival fistula, the pain will disappear. 3. Chronic periodontal abscess: chronic periodontal abscess will have sinus openings on the surface of the gums, but there is no obvious pain. Toothache after the gums grow a bag without pain, it is best to go to the hospital in a timely manner, after a professional doctor’s examination, after a clear cause of the active treatment, in order to facilitate the recovery of the condition.