October 24, 2021
Perennial allergic rhinitis (PAR) is a significant health problem, which can significantly affect patient's quality of life. The main symptoms of Allergic rhinitis are nasal congestion, nasal itch, rhinorrhea, and sneezing. Perennial allergic rhinitis is very common in Western countries, affecting 20–30% of the population, and evidence suggests that the prevalence of the disorder is increasing.