Funnel chest surgery is not very dangerous. Cardiac and pericardial injuries and displacement of the splint that occur after funnel chest surgery increase the risk of surgery to some extent, but the overall incidence of complications is not high. Postoperative complications can be categorized into early and late complications. 1. Early complications: Early complications include pericardial and cardiac injuries, pneumothorax, pleural effusion, incision infection, and pneumonia. 2. Late complications: Late complications mainly include graft displacement, acquired scoliosis, incisional aseptic cysts, and allergic rejection of the graft. It is worth noting that for experienced physicians, these complications from surgery will be actively prevented and managed, thus reducing the risk of surgery. For patients diagnosed with funnel chest, they should go to the relevant departments of regular hospitals and be treated under the guidance of specialized physicians.