Thanks for consulting at my virtual clinic. I have carefully worked through your case, and I can realize your health worries. Being your physician, I assure you not to worry as I will take care all of your medical concerns. from your details given above your son must be having upper respiratory tract infection. kindly give him lots of fluids like water or soup. gently wipe his fore head, arm pit chest and back with normal tap water dipper cloth to reduce his temperature. give him paracetamol tablet 3-4 times a day. Azithromycin antibiotic tablet one tablet a day for 3 days. If u can send me his age and weigh i can prescribe you the dose of the tablets. do this for tonight. can take him to a doctor in the morning. Hope it helps. If you need further, detailed and quick assistance related to any health issues in future, feel free to ask me a question directly from my profile. Have a wonderful time ahead. Best Regards! Dr. Arunmozhi varman