There is no accurate data on how big a lipoma can grow, because everyone’s physique is different and their condition is not the same, so we can’t make a generalization. Lipoma is a kind of benign tumor with slow growth, usually limited to subcutaneous, elastic and pushable when pressed by hand, mostly caused by abnormal fat metabolism and genetic factors. Generally, the size of lipoma is relatively small, with a diameter of 1~2cm, but due to the different conditions of each person and his/her own physique, the size of some lipomas is relatively large, with a diameter of 5cm~10cm, and the possibility of malignant changes cannot be ruled out if they are located in the deeper layers of the fat tumor. If you have a lipoma, you can go to the hospital to have a clear ultrasound examination, if there is no symptom, you can not treat it, if there is a pressure on the surrounding tissues, accelerated growth and other symptoms, it is recommended to carry out surgery in time, so as to prevent the condition from aggravating.