Nasal congestion and runny nose can be seen in a variety of diseases, such as allergic rhinitis, chronic sinusitis, cold, foreign bodies in the nose, etc., which can be judged according to other accompanying symptoms. The symptoms can be relieved by taking proper rest and drinking more water, but when the symptoms worsen, it is recommended to consult a doctor to clarify the cause, choose a suitable treatment method and follow the doctor’s prescription. 1. Allergic rhinitis: usually patients have allergic constitution, the onset is urgent, there are symptoms such as nasal itching, sneezing, runny nose, nasal congestion, etc., and physical examination shows that the nasal mucosa is pale and edematous. Hydroxyzoline hydrochloride nasal drops and ephedrine nasal drops are commonly used to shrink the nasal mucosa and reduce nasal congestion. At the same time, oral cetirizine, loratadine and other drugs to relieve the discomfort caused by allergies; 2. Chronic sinusitis: patients often have a large amount of purulent secretions, nasal mucosa hypertrophy, and often have polypoid lesions, causing nasal congestion, runny nose and headache. The nasal glucocorticoids such as beclomethasone propionate nasal spray and budesonide nasal spray are commonly used, which have anti-inflammatory effects and can relieve nasal congestion and runny nose by reducing the degree of inflammatory response of the nasal mucosa; 3, colds: patients can have sneezing, nasal congestion and runny nose, with initial clear runny nose and later mucopurulent nasal discharge and congested and swollen nasal mucosa. Usually pseudoephedrine is used to reduce nasal congestion, and amoxicillin clavulanate potassium is commonly used for anti-infection treatment when bacterial infection exists, and acetaminophen and ibuprofen are used for antipyretic and analgesic treatment when necessary; 4. foreign body in the nose: it occurs in children aged 3-4 years old, mostly with nasal congestion and runny nose on one side, and blood may be carried in the nasal discharge. Perforation.