Hyaluronic acid will be absorbed by the body within six months to one year after injection, but you haven't absorbed it for several years, which shows that the hyaluronic acid you are playing is doped with fake hyaluronic acid, which is harmful to the human body. If you don't take fake hyaluronic acid for a long time, it will lead to swelling and pain, induration, deformation, erosion, suppuration and other symptoms. Therefore, it is better to find Dr. Yunxiang with fake hyaluronic acid.