The part of one nostril that is not ventilated when sleeping on the side does not need to be treated, as this is a physiological mechanism to regulate the human body to turn over during sleep. But some people who continue to sleep on one side of the nostril airlessness by chronic simple rhinitis and aggravate such symptoms, need to carry out medication or surgical treatment. There are many capillaries in the deep part of the human turbinate, and the turbinate of the nasal cavity on the downward side can be relatively enlarged when lying on the side. With chronic simple rhinitis, the enlargement may be more pronounced, appearing when lying on the side of the downward nasal cavity nasal congestion, while the side facing up is not obvious. If the symptoms are not obvious, no special treatment may be necessary. If chronic simple rhinitis is present, nasal spray hormones such as budesonide spray and vasoconstrictors such as furosemide nasal drops are commonly used. If medication is not effective, plasma turbinate ablation surgery or inferior turbinate displacement plasty can be performed under the supervision of a doctor to expand the nasal airway to relieve the symptoms. When this symptom is more obvious and persistent, you should actively seek medical advice to clarify the cause of the disease and the degree of symptoms, and then follow the doctor’s instructions to standardize the use of medication and treatment.