The length of time that tear trough filling lasts is usually based on other reasons such as fillers, which can usually be categorized into collagen, autologous fat, hyaluronic acid and other fillers, which cannot be generalized due to large individual differences. 1. Collagen: collagen tear trough filling surgery means injecting collagen into the patient’s tear trough to fill in the depressed effect, but the effect is not permanent, and usually lasts for about a year. 2. Autologous fat: autologous fat tear trough filling surgery refers to other parts of the fat extraction, processing, and fill the tear trough depression, will survive for a long time, but due to the different survival rate of fat, so the maintenance time also varies from person to person. 3. Hyaluronic acid: Hyaluronic acid tear trough filling surgery can usually last about 6-12 months, because hyaluronic acid will be absorbed with the human body, and each person has a different metabolic rate, the duration of maintenance will also have some differences. It is recommended that patients should go to a regular hospital for tear trough filling surgery and cooperate with the doctor for related care.