This is a common benign lesion in children and adolescents that results from the rupture of the excretory ducts (very small tubes) that deliver saliva to the top tissues of the lips. More than 75% of mucocele are located on the lower lip and their size and color may vary, however, they tend to be relatively painless for the most part. Most of the time, patients report that these 'bumps' grow until they burst spontaneously, leaving small ulcers that heal within a few days. This does not mean the lesion is gone, as they often tend to re-appear weeks or months later. Most dentists will recommend surgical treatment for these lesions.