Allergic rhinitis is not a cold. Allergic rhinitis is an inflammatory reaction caused by external allergens stimulating the mucous membrane of the nasal cavity, manifested as nasal itching, paroxysmal sneezing, nasal congestion and a large amount of watery secretions. Treatment is mainly anti-allergic treatment, can be given levocetirizine oral, trimethoprim nasal spray, if necessary, can add patchouli bile tablets, chamomile tablets, etc.. The cold is a viral infection, the symptoms are similar to allergic rhinitis, but the nasal examination is different, there can be congestion and swelling of the nasal mucosa, there can be watery or purulent secretions, the treatment is mainly anti-viral treatment, drink more water, such as cold spirit.