Sore throat small patches of bumpy. and itchy rash on elbo top of foot and knee pus pockets in throat? no runny nose or caugh. what could it be?

Doctor can check: New throat pain can be from a strep throat infection (antibiotics are needed), a cold or influenza (antibiotics usually not used), or from some other cause such as allergies or irritants. 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). Strep throat can occur with a rash, but some viruses also cause rashes.