For people with allergies, experiencing a sore throat is not uncommon. This can occur when the body reacts to an allergen by producing excess mucus. This additional mucus can then drip from the nose down the back of the throat, a phenomenon known as postnasal drip. This can lead to irritation, causing the throat to feel scratchy, ticklish, or painful. Usually, people mistake a sore throat caused by allergies for a symptom of a cold ...