A small amount of blood four hours after wisdom tooth extraction is normal, a large amount of blood is not normal. Wisdom tooth extraction four hours after the blood, may be too traumatic and extraction, cotton ball bite is not tight, coagulation dysfunction and so on.
1. Excessive trauma during extraction: the resistance around the wisdom teeth is large, and the damage is large when the teeth are extracted. If you do not pay attention after extraction, talking in the mouth or opening the mouth widely may pull the affected area, resulting in blood seepage after 4 hours.
2. Cotton ball bite is not tight: under normal circumstances after tooth extraction, gently bite the cotton ball about 30 minutes will form a blood clot, the extraction of the nest is basically no longer bleeding, cotton ball bite is not tight without the formation of blood clots, 4 hours after the extraction of the tooth may still bleed.
3. Coagulation disorders: long-term use of anticoagulant drugs or have thrombocytopenia, will lead to more than bleeding after tooth extraction, there will be a lot of bleeding.
Wisdom tooth extraction 4 hours or bleeding in time to the hospital, standardized treatment.