Nasal spray sodium chloride or sea water), isotonic (0.9% sodium chloride) and hypotonic (0.65% sodium chloride). Isotonic solutions have the same salt concentration as the human body, whereas hypertonic solutions have a higher salt content and hypotonic solutions have a lower salt content. Isotonic saline nasal sprays are commonly used in infants and children to wash out the thick mucus from the nose in case of allergic rhinitis. Hypertonic solutions may be more useful at drawing moisture from the mucous membrane and relieving nasal congestion. Natural nasal sprays that include chemical complexes derived from plant sources such as ginger, capsaicin and tea-tree
Post-nasal drip back of the throat from the nasal cavity is a normal physiologic process that occurs in all healthy individuals. Post-nasal drip has been challenged as a syndrome and instead is widely viewed as a symptom by various researchers as a result of the wide variation amongst differing societies. Furthermore this rebuttal is reinforced due to the lack of an accepted definition, pathologic tissue changes, and available biochemical tests. PND may present itself through the constant presence of discomfort within an individual's upper airways as a result of the transportation of mucus from nasal membranes down the back of the throat