Throat diagnosis=ENT. For a chronic sore throat (longer than normal infections), the doctors who diagnose the throat best are ents/ otolaryngologists. They are adept at seeing all the structures deep in your throat and can do a biopsy if needed. A sore throat can be due to acid reflux, sinus infections, tonsillitis, thrush, virus, etc. If it's part of a cold, tylenol, (acetaminophen) advil or irrigation help; if bacterial, antibiotic.