Children’s teeth gums protruding bulge may be about to erupt teeth performance, may also be the teeth of the apical periodontitis triggered by pus, specific need to go to the hospital for examination. 1. Teeth are about to erupt: children in the replacement period, permanent teeth will grow upward, milk teeth gradually loose, when the permanent teeth are about to break through the gums and out of the gums, the surface of the gums will appear whitish packet, palpation of hard painless, X-ray examination of the permanent teeth can be seen at this time can be first observed without special treatment. 2. Apical periodontitis: in children’s teeth, gums protruding, bulging may also be the teeth appeared in the apical periodontitis, inflammation through the bone plate to reach the gums can appear gingival pustules, touching with a fluctuating sense of pressure, pain, redness and swelling around. Children’s teeth during the period of gum bulging specific reasons need to go to the hospital to do oral and X-ray examination of the situation after confirmation.