What is nasal pholips? how immunity and strength can be increased? my nephew is 10 years old, for past 5 years he quite often suffers from cold and cough continued with fever. Even a glass of cold water, results in tonsils and cold with fever. 1-2 hours of outdoor play makes him dull, he feels weekness and thus falls ill. Exertion results in illness. What may be the cause and cure for the same.