Bumps and lumps are a pretty common occurrence in the mouth — just ask anyone who's accidentally bitten the inside of their cheek or lip. Many of these bumps will heal on their own, but if you notice a lump that gets bigger over time or doesn't go away, it's time to visit a dentist.
One possible cause of a lump is a granular cell tumor. Also known as an Abrikossoff tumor, this growth can affect any area of the body, but the head and neck regions account for approximately from 45 to 65 percent of occurrences, says Head and Neck Pathology. A granular cell tumor may occur on sites such as the skin, tongue and hard palate. The tumor is considered benign, but a malignancy occurs occasionally. According to a report from V.S.P.M.'s Dental College and Research Centre, these tumors are typically small, solitary lesions and rarely exceed 3 centimeters in size. They often have an irregular shape and border, a fleshy appearance and are usually yellow-gray in color.