Slight sore, but very raspy throat for over 1 week. no other symptoms. no visible swelling or inflammation in the throat. what could it be?

Dr. can check throat: New throat pain can be from a strep throat infection (antibiotics are needed), a cold or influenza (antibiotics usually not used), some other cause such as allergies or irritants, or from stomach acid reflux. Usually, a person sees the doctor if the sore throat is bothersome, recurrent, or doesn't go away quickly (mainly to check for strep). A couple days of throat lozenges can lessen pain.