Hello there....Mucous cyst
is a result of trauma anywhere on the mucosa of lower lip,tongue ,buccal region. Its filled with mucous material that grows in size when not removed. The cyst needs to be removed completely without spillage of the material . As remnants of fluid or epithelial lining persists there are always chances for this cyst to recur. In case of future recurrence consult a Oral and Maxillofacial surgeon for further management.