During a physical intraoral examination, a male neonate, born at term, through vaginal delivery, presented a large volume of around 1cm in diameter in the bottom gum pad, with a soft consistency, floating to palpation, and translucid, diagnosed as a congenital eruption cyst. The diagnosis was essentially clinical, based on the lesion's characteristics. The initial follow-up appointments were conducted every 15 days and then every 30 days. After 1 month, the lesion regressed significantly. After 3 months, the lesion disappeared completely, and the bottom central incisive teeth erupted. In the fourth month, the eruption followed its normal evolution, and no teeth presented any mobility. No surgical approach was necessary, since the lesion regressed spontaneously and deciduous teeth presented no mobility, causing no tongue belly ulcer. The neonate is still in follow-up with regular tooth eruption and total regression of the lesion. During a physical intraoral examination, a male neonate, born at term, through vaginal delivery, presented a large volume of around 1cm in diameter in the bottom gum pad, with a soft consistency, floating to palpation, and translucid, diagnosed as a congenital eruption cyst. The diagnosis was essentially clinical, based on the lesion's characteristics. The initial follow-up appointments were conducted every 15 days and then every 30 days. After 1 month, the lesion regressed significantly. After 3 months, the lesion disappeared completely, and the bottom central incisive teeth erupted. In the fourth month, the eruption followed its normal evolution, and no teeth presented any mobility. No surgical approach was necessary, since the lesion regressed spontaneously and deciduous teeth presented no mobility, causing no tongue belly ulcer. The neonate is still in follow-up with regular tooth eruption and total regression of the lesion.