The most common case of tooth pain in 6-year-old girls is tooth decay. 6-year-old girls must distinguish the tooth position of the teeth, if it is the upper and lower incisors, carefully distinguish whether it is the problem of permanent teeth or the problem of milk teeth. If it is a problem of the baby tooth, it is not necessary for the 6-year-old girl to have the treatment, and the baby tooth can be extracted directly. If the remaining teeth are decayed, the decayed and painful teeth need to be treated as soon as possible by pulpotomy and root canal treatment of the baby teeth, since it takes 2-3 years before the teeth are replaced. After the pulpotomy and root canal treatment, the pain of the baby teeth will be relieved significantly, and we can wait for the eruption of the permanent teeth afterwards.