In case of physiological septal deviation, there are usually no symptoms. In case of pathologic septal deviation, symptoms such as nasal congestion, headache and nosebleed may occur. 1. Physiologic septal deviation: usually asymptomatic, no treatment is needed. 2. Pathological septal deviation: it may be caused by congenital septal dysplasia, hypertrophy of adenoids in childhood, nasal septum fracture and misalignment due to trauma to the nose. Common symptoms are nasal congestion mostly persistent, which may be unilateral or bilateral; when the projection of deviation presses on the comparison, it may cause reflex headache, and also symptoms such as nosebleed, tinnitus, ear stuffiness, snoring, and decreased sense of smell. Nasal septum deviation to appear the above symptoms, it is recommended to timely consult a doctor, follow the doctor’s instructions for treatment, so as not to miss the condition.