Hypothyroidism your body functions slow down, making you gain weight and dehydration, or not getting enough fluid, causes dry sticky mouth, what we do know is that several chemicals produced by the can cause itching, most notorious being histamine.
Operations Research (O.R.), or operational research in the U.K, is a discipline that deals with the application of advanced analytical methods to help make better decisions.
In quantitative research: We construct operational definitions that include: 1) A detailed definition of the concept 2) Information about the scope of the concept measured. 3) Detailed information about how the concept will be measured.