[header] How to know if you have lipoma [title] Look for a small bump under the skin. [step] Lipoma is generally dome-shaped and can range in size; generally, it is between the size of a pea and roughly three centimeters in length. They have been seen in areas such as the back having grown much larger. 
These lumps are formed by a rapid increase of fat cells in the area. [title] Understand the difference between lipoma and a cyst.