Allergic rhinitis is an inflammation of nasal passages and affects more and more people every year. Treatment though is hit-or-miss. Probiotics may help by interacting with the immune system; much depends on the type of bacterium, route of administration, dosing, regimen, and other underlying host factors.
Much is still unknown as this review in North American Journal of Medical Sciences suggests. Still the future looks brighter–and less congested–for those who suffer.