Autologous fat filler is a procedure that uses a syringe to extract fat from other parts of the patient’s body, and then injects pure fat particles into the tear trough after treatment. Most of the tear troughs can be solved by one filler, but there are also candidates who need a second filler. After transplantation, the fat cells can regain blood circulation through the newly established capillaries in the body to make the fat viable, and the viable fat will not wander away and disappear, making it a permanent filler. Autologous fat filler tear trough has the advantages of easy survival, small trauma, short recovery period, and no rejection reaction by the candidates. Generally speaking, the swelling of fat filled tear trough can be reduced within 1 week, and the swelling can be basically stabilized in about 1 month, and the filled area can be restored naturally. However, fat filler has a certain survival rate. Usually, about 50% of the fat can survive, and only the fat cells that have survived stably can exist permanently in the tear trough area to maintain the fullness of the tear trough. If the amount of fat cells filled is not well controlled, unevenness of the filled area and protruding eye bags can occur. Therefore, it is important for candidates to choose an experienced surgeon when performing autologous tear trough filler to ensure the best filler results.