Lipoma is a benign tumor caused by family heredity, high-fat diet and other factors, which is formed by mature fat particles, so it is yellowish in color, and most of them are flat or lobulated in clinic. 1. The color of lipoma: because lipoma is caused by excessive proliferation of fat cells, so its main component is fat cells, because fat cells are yellowish, so lipoma is also yellowish. 2. The shape of lipoma: in the clinic, the formation of lipoma is more common as flat and lobular, and part of it can also be oval or round, especially the lipoma on the back is mostly flat due to the long time pressure. Lipomas can be pushed because of their clear demarcation from the surrounding tissues. Lipoma belongs to benign tumors, for the small size, no abnormal symptoms do not need treatment, while the larger lipoma or compression of surrounding tissues, the need for surgical treatment, the specific circumstances recommended to go to the hospital, complete the auxiliary examination, in order to clarify the condition, the professional physician for treatment.