Mucoceles are diagnosed through an oral examination to determine the number, location, and severity of each mucocele. A simple test Dr. Pashapour may perform is to apply pressure on the lump, as long as you are not experiencing pain, to see if the mucocele changes color. If the lump turns white under the pressure, it may indicate a harmless growth of blood vessels known as a hemangioma. After removing any swollen tissues, Dr. Pashapour will have the samples sent out to a lab to test for any serious diseases. In the vast majority of these cases, the results do not indicate a serious disease. Dr. Pashapour may order an x-ray to determine if there is a stone present in the salivary gland.