Thanks for your question on Health Care Magic. I can understand your concern. Fever, wheezing, breathing difficulty, blocked nose etc in children are commonly due to viral respiratory tract infection. But better to rule out pneumonia first. So get done chest x ray. If chest x ray is clear then no need to worry for pneumonia. He needs plenty of fluids orally, oral bronchodilators, antihistamine and anti inflammatory drugs. Hope I have solved your query. I will be happy to help you further. Wishing good health to your son. Thanks.