Yes. According to Baidu Health Query, local swelling will occur after hyaluronic acid is injected into the mouth. This is a normal phenomenon. The swelling will subside after 1-2 days. Anti-inflammatory injections can be used to reduce the swelling. Hyaluronic acid injection is a common micro plastic surgery. Hyaluronic acid is mainly injected into the face or other parts of the body to achieve beautification and shaping effects.