Oral mucoceles and ranulas are retention phenomena/mucus extravasation that occur in the lower lip on the buccal floor, probably traumatic etiology, manifesting itself as well-defined bubbles and circumscribed, with varying sizes and coloring ranging from translucent to purple. Their diagnoses are clinical and when there are doubts, puncture and aspiration assists in the clinical diagnosis, which is confirmed by histologic study after removal of the lesion. The treatment of both injuries is usually surgical, but in children cryosurgery is the recommended conservative treatment, which is based on the cell death caused by an osmotic imbalance because of successive freezing and thawing cycles that end up taking excess water to the interior of the cell, causing lysis of the cell membrane. The present work reports 2 cases of ranula and mucocele in 18-month-old clinically diagnosed and treated with cryosurgery.