Mouthwash can be used to clean the mouth after tooth extraction, but it should be used 24 hours after the extraction to avoid dislodging the blood clot and affecting the healing of the extraction wound. After tooth extraction, the bleeding will stop in about 15~30 minutes, and then a blood clot will be formed to close the wound. The blood clot is crucial to the healing of the extraction wound, and if it is dislodged, it may cause pain, infection, dry socket and other diseases or symptoms. Therefore, 24 hours after tooth extraction, you should not brush your teeth, rinse your mouth, or suck on the wound to protect the blood clot. Mouthwash can clean the mouth, and some mouthwashes also have antiseptic effect, which is beneficial to the healing of the tooth extraction wound, but it should be used 24 hours after tooth extraction. If symptoms of blood clot dislodgement occur, it is recommended to visit the hospital for early treatment.