If there is a problem with forehead filling, the sooner the better. Choose qualified hospitals, doctors and take out the technology. At present, most of the fillers with problems are illegal injections, including Ogilvy, growth factor, bone powder, silicone oil and microcrystalline porcelain, any of which will do harm to human health and even cause cancer if not taken for a long time. Now, we can locate the distribution of injection with 3D endoscope, then take out the injection under direct vision, avoid blood vessels, nerves and tissues, take out necrotic tissues, lumps and capsule tissues, and implant biological patches to repair damaged tissues.