3-year-old children always say stomach pain, consider and gastroenteritis, ascariasis, chronic appendicitis and other factors related to the choice of medication or surgical treatment and other ways to relieve. 1. gastroenteritis: 3-year-old children with gastroenteritis disease can have the manifestation of constant stomach pain, which may also be accompanied by diarrhea, vomiting and other symptoms. Under bacterial infection, antibacterial drugs such as cefixime can be chosen according to the drug sensitivity; under viral infection, no special treatment can be given; at the same time, probiotics such as bifidobacteria can be taken orally to regulate the gastrointestinal tract and improve the symptoms. 2. Ascariasis: 3-year-old children with roundworm infection in the stomach may also cause stomach pain, can cooperate with the doctor to choose mebendazole, ivermectin, albendazole and other medications to achieve the purpose of deworming and killing worms. 3. Chronic appendicitis: If the child’s stomach pain is caused by chronic appendicitis, you can choose to surgically remove the appendix if necessary, and at the same time choose amoxicillin clavulanate potassium and other drugs to fight infection. Three-year-old children always say stomach pain, there may also be other causes such as mesenteric lymphadenitis, need to cooperate with the doctor to improve the examination, and then do the treatment. The above drugs need to be used in accordance with the doctor’s instructions.