A deviated septum with a deviated left side of the nose is mainly treated by surgical correction. The reason for the left side of deviated septum is that C-shaped deviation of the septum may cause the same side of the nose to be out of breath, and the diagnosis of deviated septum is established, and the patient has obvious symptoms of nasal congestion, which should be treated. Generally speaking, the deviated nasal septum with obvious clinical symptoms needs to be corrected surgically, and the commonly used surgical methods are nasal endoscopic submucosal correction of the nasal septum, septoplasty, and three-line septal decompression surgery, etc., so as to completely alleviate the symptom of nasal dyspnea. If the left side of the nasal septum is deviated, you should consult a doctor in time, and a specialist should diagnose and treat the problem.