What should a 3-year-old child do with a serious toothache?

Now the incidence of tooth decay and toothache in children is very high. The fourth national oral health survey found that the incidence of dental caries in 5-year-old children was about 70%, and the incidence of dental caries in 12-year-old population exceeded 20%. The incidence of permanent teeth is very high, and dental caries in children will cause great harm, the most common one is toothache. Generally speaking, the causes of toothache are as follows:

1, when the dental caries are deep, it will cause nerve exposure;

2, invading the pulp, causing pulpitis and periapical periodontitis, which will cause pain;

3, children's tooth decay will cause food impaction, which may cause gum inflammation and cause pain. If it is irritating pain or biting pain, it may not hurt after filling the tooth hole; If it is gum inflammation caused by food impaction, it may also be pain relief after filling the hole; If it is pulpitis or periapical periodontitis, if it is serious, the patient should be treated with dental pulp, that is, after root canal treatment, it can be painless.