Hello I had gone through your question and I really appreciate your concern this could be a acute gastroenteritis or URTI warning signs in such a case are following high grade fever with chills Uncontrollable vomiting bloody diarrhoea or abdominal cramps dehydration give him plenty of lukewarm water including ORS to.maintain good hydration and electrolyte deficiency fruit juices and fresh fruits warm saline gargles or steam inhalation multivitamin supplements especially vitamin C Hope this helps you good luck