Gingival fistula itself is a chronic apical periodontitis breaks through the alveolar bone in the gums to form a channel to drain pus, in this case, if left untreated, most of the time the condition is recurrent or persistent, and ultimately lead to loosening of the teeth or even loss. Generally speaking, gingival fistula needs to be treated as early as possible. If gingival fistula occurs in the milk teeth, it must be treated especially early because untreated apical inflammation of milk teeth may cause damage to the permanent teeth underneath, resulting in Turner’s tooth. In the case of permanent teeth, since a gingival fistula has been formed, the patient’s pain is not noticeable, but the tooth loses its nerve nourishment and becomes darker in color, eventually falling out in pieces or splitting the tooth. In the case of a gingival fistula, it is recommended that the tooth be treated with a root canal as soon as possible and protected with a crown restoration.