Vomiting in a 7-year-old child may be related to improper diet, acute gastritis, intestinal parasitic infection and so on. 1. Improper diet: it may be that the child has eaten chili, fried chicken, ice-cream and other cold and greasy food, which may increase the burden on the intestinal tract and lead to gastrointestinal dysfunction, resulting in vomiting symptoms. 2. Acute gastritis: it may be that food allergy, foreign objects in the stomach, mental tension and other reasons, stimulate the gastric mucosa leading to its acute inflammation. Symptoms such as lack of appetite, abdominal pain and vomiting may occur. 3. Intestinal parasitic infections: such as pinworms and other infections, pinworms are often parasitic in the intestinal tract, its secretion may lead to gastrointestinal tract dysfunction. Abdominal pain, loss of appetite, vomiting and other symptoms can occur. Vomiting in 7-year-old children can also be seen in other causes, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions to carry out relevant examinations, with the help of the doctor to clarify the cause, and targeted treatment or therapy.