15 days after the deviated septum surgery, you can eat mooncakes, and avoid spicy and stimulating food, tobacco and alcohol for a short period of time after the surgery. 1. Deviated septum surgery is a minimally invasive force surgery in the nasal cavity, 15 days after the operation, basically the trauma in the nasal cavity has already healed, eating mooncakes will not affect the postoperative repair of the nasal cavity. 2. Eating spicy and stimulating food or smoking and drinking will stimulate the mucous membrane in the nasal cavity and cause inflammation, affecting the repair of the wound after the deviated septum surgery, and in serious cases, it may lead to the phenomenon of infection in the nasal cavity. In addition to diet, regular nasal rinsing is needed to prevent the buildup of postoperative scabs in the nasal cavity, which may cause infection in the nasal cavity. Regular postoperative nasal endoscopic review is required to observe the recovery of the nasal cavity after deviated septum surgery.