Nasal congestion requires standardized treatment according to the cause of nasal congestion, common causes include colds, allergic rhinitis, deviated septum, nasal polyps, etc., which can be treated with medication, surgery, etc. according to the condition. Therefore, there is no such thing as “what is the worst thing about nasal congestion”. 1. Colds: Nasal congestion caused by colds can be relieved by using some medicines containing decongestants, such as Phenmetrazine and Capsulol Pseudoephedrine. 2. Allergic rhinitis: nasal congestion caused by allergic rhinitis can be treated with nasal decongestants, such as hydroxymetazoline; and with anti-allergic drugs, such as cetirizine and loratadine. 3. Deviated nasal septum: Surgical treatment can be taken, including submucosal resection of nasal septum and submucosal correction of nasal septum. 4. Nasal polyps: Nasal polyps causing nasal congestion is mainly treated by nasal endoscopic surgery, and should be regularly rechecked after surgery. Nasal congestion is caused by many reasons, not simply including the above, should consult a doctor in time to clarify the cause, and standardized medication and treatment.