I use zinc lozenges, if it comes on suddenly. Usually means it's an infection. By it being itchy, it would imply that it's more of an allergy, not infection. I gargle with thyme, because it has anti-inflammatory properties, then try to figure out the source of the problem. For example, I ate yogurt, with aspartame in it. My throat became very itchy, as well as sore. My tongue became thick, not long after. So, I took benedryl, because I knew, at that point, it was an allergic reaction. Needless to say I stay away from aspartame.