Pterygium is a common and frequent disease with reported incidence ranging from 0.7% to 31%. The clinical manifestation is the centripetal growth of fibrovascular tissue, which can affect the aesthetics in mild cases and cause severe visual impairment in severe cases involving the pupillary area. Surgery is still the most feasible method of pterygium treatment, including simple excision, excision combined with conjunctival flap transposition, and excision combined with autologous corneal margin stem cell transplantation. However, pterygium surgery has a certain recurrence rate, which is the most common problem after surgery. According to statistics, the recurrence rate can be as high as 24-89% with simple excision alone. The recurrence rate of pterygium can be reduced to 10-15% if combined with conjunctival flap transposition or autologous flap transplantation. In addition, the recurrence rate of pterygium surgery is closely related to surgical experience, surgical technique, and preoperative and postoperative management. Patients should adhere to follow-up appointments until 3 months after surgery. What is a pterygium? As shown below, pterygium should be operated when it invades more than 2mm of the cornea, which is 1/5-1/4 of the black kernel, otherwise it is too late to invade the pupil area. First day after pterygium surgery