hi there, sore throat
can be caused due to viral infection or bacterial infection..Usually bacterial infecton will come along with systemic symptoms like fever
and yellow or greenish productive sputum. Viral infection causes lots of malaise, lethargy
and body pains with a feverish feeling tho' not necessarily with raised temperature. Your son may be suffering from viral infection and so he is having all the symptoms without actually having fever. Do not worry, give him warm saline gargles, anti-inflammatory syrup and antihistaminics if there is runny nose and congestion. viral infections are self limiting and subside on its own in5-7 days.If he does develop fever you could give him paracitamol and if required consult your GP. Take care.