Complications of allergic rhinitis include obstructive sleep apnea syndrome, allergic conjunctivitis and bronchial asthma. 1. Obstructive sleep apnea syndrome: due to allergic rhinitis, nasal mucous membrane edema, nasal congestion, sleep snoring, accompanied by recurrent apnea and other symptoms. Patients with long-term presence of this disease may develop cardiovascular system diseases. 2. Allergic conjunctivitis: most of the patients with allergic rhinitis belong to the allergic body, and the onset of allergic conjunctivitis is often accompanied by allergic conjunctivitis, which is specifically manifested as itchy eyes, congestion, tearing and other symptoms. 3. Bronchial asthma: As the triggers of the two diseases are allergens, the onset of allergic rhinitis may be accompanied by bronchial asthma attacks, which are characterized by coughing, coughing up phlegm and dyspnea. It is recommended that patients with allergic rhinitis should actively seek medical treatment and take targeted treatment to prevent the occurrence of various complications.