common for anyone who has had a recent throat infection... the throat is irritated to the point that when it's dry it has a tingling poking itch that makes you cough and gag. This will go away after the throat irritation is gone, but I've had it when I get a cold, or on dry mornings. Drinking water does not help because the dry irritation isn't resolved - usually coughing so much that the mucous builds up and your swallow will cover it - but that's hardly what anyone wants. Instead get some soothing throat tea (slippery elm) - it's a bit smooth and slimy and does a great job covering over the throat.