Children with tooth decay pain is not recommended to use drugs, because tooth decay is the necrosis of the tooth tissue area, drugs do not have a good effect. It is recommended to go to the hospital in time to identify the cause of the disease, so as to target treatment according to the cause. 1. Caries: If the stimulation of eating cold, sour, hot, sweet and other food pain, generally do not need medication, because the use of drugs is ineffective. The decayed and necrotic tissues in the decayed tooth can be removed by dental drilling and then filled. 2. Pulpitis: Spontaneous pain due to infection of the cavity wound. Surgical treatment, such as pulpotomy, is recommended to establish a smooth drainage channel to control the pain before proceeding to the next step of treatment. 3. Apical abscess: mainly due to caries is not timely treated, resulting in pulpitis, the apical hole of milk teeth is large, the spread of infection is easy to cause apical inflammation, it is recommended to consult a doctor in a timely manner, drainage of pus on the medicine. Cavity pain is recommended to consult a doctor in time, symptomatic treatment, to avoid the spread of inflammation. At the same time, it is recommended that in daily life, eat less sweets, and develop a good habit of brushing teeth diligently. It is also important to have checkups from time to time, thus further benefiting the prevention of tooth decay.