Dehydration will cause your skin to be dry and flaky and itches , just like what we call winter skin, and can also cause your sips to be very dry, chapped and red from the dryness, but the way you describe your symptoms, you have something systemic going on,, like an allergy.
Operating Standards are a set of guidelines or regulations that people have to meet or exceed while in operation. It makes sure that the product that they produce is of acceptable quality for consumption by the public.
An important aspect of a quality system is to work according to unambiguous Standard Operating Procedures (SOPs). In fact the whole process from sampling to the filing of the analytical result should be described by a continuous series of SOPs. A SOP for a laboratory can be defined as follows: Standard Operating Procedure is a document which describes the regularly recurring operations relevant to the quality of the investigation.