As the first line of defense of the human respiratory tract, nasal hairs can effectively prevent pollutants inside the air from being sucked into the nasal cavity or even into the airway. If the nasal hairs are completely plucked out, the patient will often have nasal congestion, nasal itching, sneezing, because will always be exposed to dust or other pollutants, the patient will often have an irritating cough, which in serious cases can easily lead to lung infection. Therefore, it is recommended to avoid plucking all nasal hairs in life, and if the patient has long nasal hairs, they can be trimmed regularly to reduce the irritation to the mucous membrane of the nasal cavity. At the same time, if the patient’s nasal cavity is very dry or has a lot of secretions, you can consider spraying with physiological sea saline, which can effectively play the role of moisturizing and cleaning.