It is not usually mandatory to take fluids for 3 days after tooth extraction. If infusion is taken in case of severe inflammation of maxillofacial space infection and cellulitis, it is at least 3 days. 1. At present, infusion is rarely given after tooth extraction in clinical practice. Some people have a particularly small reaction after tooth extraction and do not need oral anti-inflammatory drugs, much less fluids. Even when the extraction is difficult and traumatic, it is expected that there will be obvious pain and swelling after the operation, and there is a risk of infection, it is generally recommended to take oral anti-inflammatory drugs such as metronidazole, cephalosporin, and the use of medication should be in accordance with the doctor’s instructions. 2. Unless infection has already occurred after tooth extraction, such as maxillofacial gap infection, cellulitis, severe inflammation, then you can receive fluids, usually at least 3 days. Depending on the situation, it will be decided whether to continue the infusion or change to oral anti-inflammatory drugs.