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.
Ethology: The Study of Animal Behavior. Ethology is the scientific and objective study of animal behavior. The word itself is derived from the Greek words ethos (meaning custom or character) and logos (meaning speech, word, controlling principal, fundamental reason). In order to study the custom or character of a species it is necessary to observe it in a natural setting.