I am feeling scratchiness in my throat from past 2 days. Last month the same thing happened but it got cured on its own. My throat and nostrils  also get dry. From past 2 months there was mucous in my throat but since it has begin to dry the scratchiness of the throat has increased. It happens Mostly after taking meals and during night time. Kindly tell me the possible reason and is it something serious ??