If a lipoma is left untreated, it typically does not pose serious health risks since lipomas are benign tumors. Most lipomas grow slowly and remain small, often causing no symptoms or complications. They are usually painless and can be left alone without any medical intervention if they do not cause discomfort or aesthetic concerns.   However, in some cases, untreated lipomas can grow larger over time, potentially leading to a few issues. As they increase in size, they might become more noticeable and cause cosmetic concerns for some individuals. Additionally, a larger lipoma might press against nearby tissues, nerves, or blood vessels, leading to discomfort or pain. In rare instances, this pressure can interfere with normal bodily functions, depending on the lipoma's location.