Axillary lipoma may be related to genetic factors, chronic inflammation, systemic lipid metabolism abnormality and other causes of triggering, causing fat cell proliferation and formation. When the body due to genetic factors, chronic inflammation stimulation or abnormal lipid metabolism caused by abnormal proliferation of normal fat cells, it can lead to the appearance of lipomas in any part of the body where there is fat, such as axillary lipomas, which are usually single or multiple, and can also be seen in the deep part of the body. If the lipoma grows slowly, is benign and has no clinical symptoms, it usually needs no treatment, and attention should be paid to observing its changes and regular checkups; if the tumor is relatively large, or even compresses organs and nerves, causing pain and other symptoms, then timely treatment is needed. When lipoma appears, it can be clarified whether treatment is needed under the guidance of doctor.