Constant dry/gritty feeling in my throat &what appears to look like white canker sores on & off for 4+wk. pcm checked it & said just a virus-no relief?

See dentist: Canker sores do not usually come back that frequently. Perhaps you need to have your dentist take a look at the mouth. There are also autoimmune diseases which can cause ulceration in the mouth as would be certain drug reactions. Once the dentist has determined what kind of problem you may have, he can either treat you or refer you elsewhere.