My son has a rash on his cheeks, a fever and cold like symptoms with a sore throat, do i need to give it time to pass or do i need to have him be seen?

Doctor can examine: Throat pain with fever can be from a strep throat infection (antibiotics are needed), a cold or influenza, or from other viruses or some other causes. Usually, a person sees the doctor if the sore throat is bothersome, recurrent, or doesn't go away quickly (mainly to check for strep throat). Sometimes a red rash with a slightly rough texture but no blisters, comes with strep throat.