Small pustules on the gums do not usually cause a cough. There are many reasons for coughing, bronchial inflammation, allergic cough, chronic pharyngitis or taking other medications, but small pustules growing on the gums is a localized inflammation of the teeth, which usually does not cause coughing. The main cause of small pustules on the gums is chronic apical periodontitis or chronic periodontitis. Chronic apical periodontitis purulent secretions in the root canal can not be drained from the broken tooth, destroying the periapical peripheral tissues from the gums, small pustules, the need for timely root canal treatment. Chronic periodontitis, infection in the deep periodontal band, localized formation of abscesses, pustules appeared after the rupture, need to clean tartar in time, periodontal series of treatment. Apical periodontitis and chronic periodontitis, if not treated in time, will recur when the body resistance is low. So pus on the gums does not cause coughing, cough with pus on the gums, need to consult a doctor in time, under the guidance of the doctor for standardized treatment.