The main causes of nasal congestion and runny nose include upper respiratory tract infection, allergic rhinitis, acute rhinitis, etc. Different medications are given according to different causes, and it is necessary to pay attention to a light diet and drink more water. 1. Upper respiratory tract infection: mainly manifested as upper respiratory tract symptoms, such as nasal congestion, runny nose, general treatment can be given, such as drinking plenty of water, pay attention to warmth, light diet and so on. If the general treatment symptoms do not improve or symptoms worsening, you can use medication under the guidance of a doctor, such as compound aminophenol xuanamin granules, pseudoephedrine and other drugs. 2. Allergic rhinitis: Nasal congestion and a large amount of watery nasal discharge will occur after exposure to allergens. You should actively search for allergens and avoid them, and if necessary, use antihistamines such as loratadine and cetirizine under the guidance of a doctor. 3. Acute rhinitis: acute inflammation of the nasal mucosa, mostly co-existing with acute pharyngitis. Treatment commonly used decongestants such as hydroxymetazoline hydrochloride nasal drops, can also use nasal glucocorticoids such as budesonide nasal spray. Antibiotic therapy such as amoxicillin may be applied if there is a coexisting bacterial infection. Nasal congestion, runny nose can also be caused by other diseases, if the symptoms do not improve or aggravate, it is recommended to go to the hospital in a timely manner and do the relevant auxiliary examination, in order to clarify the cause of the disease, guide the treatment, do not unauthorized use of medication, in order to avoid misunderstanding the condition.