Rhinitis causes coughing, mainly due to postnasal drip syndrome, which is characterized by retropharyngeal coughing, throat clearing, runny nose, and increased oropharyngeal mucus. Postnasal drip syndrome is caused by mechanical irritation caused by nasal or sinus secretions dripping into the pharynx. It causes postnasal drip and can occur in seasonal allergic rhinitis, perennial allergic rhinitis, perennial non-allergic rhinitis, vasomotor rhinitis, post-infectious rhinitis, and chronic sinusitis. Most coughs caused by postnasal drip have the following symptoms: coughing up phlegm at the back of the throat, throat clearing, runny nose, and increased oropharyngeal mucus. If in addition to the cough symptoms, there is a feeling of a foreign body dripping into the throat, the need to clear the throat, throat itching, runny nose and other manifestations. Rhinitis should be comprehensively diagnosed by a professional doctor to avoid a single symptom diagnosis of the disease. Daily attention should be paid to keep the living environment clean, drink more water, appropriate physical exercise.