After tonsil surgery, the white membrane generally indicates that the wound has basically returned to normal and normal diet can be gradually resumed. After tonsil surgery, a white membrane is often formed around the tonsils, which is a normal reaction of the body after surgery, and has the function of preventing infection and protecting the wound, and usually starts to fall off gradually in 6~7 days after surgery. If the white membrane turns brownish, yellowish, thick, or even black, it may be infected and should be treated with anti-infection therapy. After tonsil surgery, the general diet needs to be transitioned from liquid to semi-liquid until soft food, so as not to scrape the leucoplakia with food that is too hard or cause it to fall off early, which may lead to bleeding at the tonsil surgery site. As the wound gradually heals, the white membrane begins to fall off, and most of it can fall off in about 2 weeks, which generally means that the wound has basically healed completely, and you can gradually return to a normal diet with soft foods.