It should be sebaceous cyst, also known as powder tumor. It refers to the cyst formed by sebaceous gland accumulation after sebaceous duct obstruction. The skin color may be normal or light blue. Generally speaking, it is caused by acne on the face before, which will gradually increase with external stimulation. Of course, the fat accumulation you mentioned may also be a lipoma and a common benign tumor, but it feels unlikely. Anyway, if sebaceous cyst is white bean curd residue-like content, lipoma is yellow content, and this operation will tell. In the final analysis, if you ignore it, it won't do any harm to your body, but it will affect your appearance on your forehead and will gradually increase in the future (of course, the increase rate is very slow, so don't worry too much). If you feel that the beauty is affected, I suggest you find a formal beauty department in a large hospital to do this operation. If there is no beauty department, you can go to general surgery. You should make it clear to the doctor in advance that you can do cosmetic suture. The operation is very simple, and you can do it in the clinic for half an hour to solve the problem. By the way, do you have a scar constitution? If so, don't do it.