3 years old child has a fever, what reason is perspiring all over when disgusting vomiting

The child has fever, nausea, vomiting and other symptoms, and sweating all over the body. It is considered that the child has a fever and eats unclean food, resulting in acute gastroenteritis and other diseases. It is recommended to take the child to the hospital for examination as soon as possible. After clarifying the cause, follow the doctor's advice for fluid replacement, and use antipyretic and antiemetic drugs for treatment.