Hyaluronic acid injection for lip augmentation is relatively safe, and a few people may have some complications. Common acute complications include acute allergy, transient erythema, edema, induration, itchy skin and ecchymosis. Early complications include overcorrection, local infection, skin necrosis, herpes recurrence, skin color change and persistent local symptoms (erythema, edema, induration, skin itching and pigmentation, etc. ); Long-term complications can be seen as infection, filler displacement, delayed hypersensitivity, foreign body granuloma and scar formation.