Like lipomas in other body parts, there is no clear cause for forehead lipomas. It may be due to a systemic metabolic abnormality, or it may be due to chronic inflammation or genetic factors. Lipomas tend to occur in people who are stressed, have a poor diet or live an irregular lifestyle. Lipomas are common benign tumors that can occur anywhere in the body where there is fatty tissue. Usually, lipoma has no obvious clinical symptoms, but a very few patients will experience pain and numbness due to the large size of lipoma, which will press on the surrounding blood vessels and nerves. Generally speaking, lipomas with a diameter of less than 1cm do not require treatment and can recover on their own. For larger lipoma, surgery is usually recommended. In addition, patients should develop good living habits and dietary habits in daily life, which can effectively avoid the occurrence of lipoma.