Symptoms of allergic rhinitis include nasal itching, paroxysmal sneezing and watery nasal discharge. 1. Nasal itching: allergic rhinitis patients often due to allergens such as pollen, dust and other allergens lead to respiratory allergic reactions, mucosal vasospasm and other stimulation of lymphocytes, eosinophils infiltration, stimulation of the nasal parasympathetic nerve caused by itchy, so patients with allergic rhinitis will be itchy nose symptoms. 2. Paroxysmal sneezing: allergen stimulation causes rapid onset of allergic immune response, the production of chemical substances that cause capillary dilation, vascular exudation, edema, these exudate stimulation of the nasal mucosa peripheral nerves, thus causing allergen stimulation paroxysmal sneezing. 3. Watery nasal discharge: the allergic reaction stimulates mast cells to degranulate and produce secretion of plasma watery substances, thus producing watery nasal discharge. When the above symptoms of allergic rhinitis appear in patients, timely consultation, clear diagnosis, standardized treatment in accordance with medical advice.