Nerve damage. Dry mouth can be a result of nerve damage to the head and neck area from an injury or surgery. Dehydration. Conditions that lead to dehydration, such as fever, excessive sweating, vomiting, diarrhoea, blood loss and burns can cause dry mouth. Surgical removal of the salivary glands.
Ethnopharmacology is a related study of ethnic groups and their use of drugs. Ethnopharmacology is distinctly linked to plant use, ethnobotany, as this is the main delivery of pharmaceuticals. Ethnopharmacy is the interdisciplinary science that investigates the perception and use of pharmaceuticals within a given human society.
Anthropology is the science of what we now call humankind, including cultural, social, linguistic, archaeological (prehistoric and historic) and physical aspects. Physical anthropology includes genetics, human biology, and primate studies, including primate behavior studies. Ethnography is a methodology first associated with social or cultural anthropology but which has since spread to many other social sciences and even fields like education and management studies.