Children vomiting without energy and fever may be related to improper diet, cyclic vomiting syndrome, gastrointestinal surgical diseases, and so on. 1. Improper diet: If the child eats too much, or eats ice cream and other cooler foods, it will lead to gastrointestinal dysfunction. Usually no fever may vomit, leading to stomach upset causing bad spirits. 2. Periodic vomiting syndrome: due to the child’s over-sensitive nerves, the neuromuscular activity of the vomiting center is abnormal. Frequent and violent vomiting may cause the child’s mental condition to be poor, usually without fever. 3. Surgical diseases of the digestive tract: such as intussusception and intestinal obstruction. In the early stage, due to the occupation or structural abnormality of the digestive tract, children may feel uncomfortable causing poor mental condition. Vomiting is the prominent abnormal manifestation, and there will be no obvious fever symptoms. Vomiting in children with no spirit and no fever can also be seen in other causes, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions for further examination, with the help of the doctor to clarify the cause, and targeted treatment or therapy.