After wisdom tooth extraction, if white stuff appears on the surface of the wound, it is usually the gum tissue that has not recovered well or the granulation tissue formed by the initial mechanization of the blood clot. It takes about three months for the wound to heal completely, and the white stuff gradually turns into normal colored gum tissue. After the extraction, it is important to protect the blood clot in the socket, which will slowly mechanize and form granulation tissue in about a week, which is slightly white. At this time, do not chew with this side of the tooth, protect the granulation tissue, and then chew normally for about a month. It takes about two months for the granulation tissue to slowly develop into normal tissue, and special care must be taken not to injure the white stuff during this period.