Hello and welcome to Healthcare Magic. Thanks for your query.
From the description of your son's symptoms, it appears that he is having a respiratory infection. Now, though it is true that most respiratory infections are caused due to viruses, sometimes they can be due to certain bacterial infections also. You have mentioned that your son is having leg pains, which is indeed common in viral fevers. But if he is having any joint pains
or swelling, then you need to be cautioned. Sometimes, fever and sore throat
asscociated with joint pains could be indicative of an acute rheumatic fever
. Don't get scared by this, since this information is just to keep you aware and cautious.
If your son's symptoms are resolving, then you can continue symptomatic management. But if his fever is persisiting for more than 5 days or if his symptoms are worsening or if he develops any other complications, then you need to seek further medical attention.
Wish you all the best.
Dr. Jonas Sundarakumar