Most cases of caries and pus in baby’s gums are due to the fact that baby’s caries has progressed to the stage of apical inflammation, a fistula in the baby’s gums caused by apical inflammation of the milk teeth. Many parents think that the caries of the milk teeth do not need to be treated, and wait for the permanent teeth to be replaced after the good, this idea is completely wrong, if left untreated, it will eventually lead to the damage of the permanent teeth known as the permanent teeth of the Turner’s teeth. The best way to deal with this is to go to a professional stomatology department, preferably one that has pediatric dentistry, to carry out dental treatment for this milk tooth, applying high-speed turbine drilling to drill open the milk tooth, and then carry out systematic root canal treatment for the milk tooth, filling the milk tooth so that the milk tooth will continue to serve until the stage of replacement of the milk and permanent teeth, and the apical fistula of the milk tooth will be gradually closed in most cases after the completion of the treatment.