Allergic rhinitis, which is short for allergic rhinitis, is also known as allergic rhinitis. Allergic rhinitis, stimulated by allergens (allergens), is an immune response that causes a series of nasal symptoms due to allergic inflammation of the nasal mucosa. Allergic rhinitis, can be divided into perennial allergic rhinitis and seasonal allergic rhinitis. Allergens of allergic rhinitis are the direct cause of allergic rhinitis. Patients are mostly atopic (i.e., allergic) and when exposed to certain antigens (allergens) that are harmless to most people, they cause allergic inflammatory changes in the nasal mucosa. Allergens in perennial allergic rhinitis are mainly caused by dust mites, house dust, fungi, etc. Seasonal allergic rhinitis, on the other hand, also known as hay fever, mainly develops in a particular season. In hay fever, the nasal mucous membrane metamorphosis is caused by the inhalation of pollen during the flowering season of plants. Symptoms of allergic rhinitis include nasal itching, paroxysmal sneezing, runny nose and nasal blockage. The main treatment for allergic rhinitis is to get rid of the allergic environment and avoid the stimulation of allergens for effective treatment and prevention. Any other treatment can only relieve the symptoms of allergic rhinitis and cannot cure it.