If you forget to take off the cotton after tooth extraction, you must contact the attending doctor in time and try to visit the hospital, and do not rashly spit out the cotton by yourself. Because the cotton stays in the mouth for a long time, it will easily lead to a large amount of plaque production, which will eventually affect the infection of the wound of the extraction socket and even the symptoms of dry socket, the patient should go to the dentist in time to observe whether there is any infection in the extraction wound. If there is indeed infection, it needs to be treated promptly, and if there is dry socket, it is also necessary to scrape off the infected material in the extraction sockets promptly, and then to stop the bleeding and anti-inflammation again. The cotton must be spit out and spit out in time after an hour or so to avoid unnecessary trouble caused by the remaining cotton remaining in the mouth. As a foreign body, cotton will irritate the extraction sockets for a long time and lead to non-healing of the extraction wounds, and it will also easily cause poor blood flow to the extraction wounds, which will easily cause obstacles to soft tissue repair.