Dry nose at night with the air conditioning on can be started by raising the humidity in the room, keeping the nasal passages moist and replenishing water. 1. Improve indoor humidity. Blowing air conditioning leads to dry indoor air, before going to bed can be placed in the house in a pot of water or put a wet towel, the best conditions is to buy a humidifier to enhance the humidity of the indoor air, to prevent the nasal cavity dry. 2. Keep the nasal cavity moist. You can use compound peppermint nasal drops under the guidance of a doctor, nasal cavity for wetting. It can isolate the dry air on the nasal cavity to cause damage to the role of the nasal cavity to maintain a lasting moist nasal cavity. 3. Supplemental water. Diet, eat more water and vitamin-rich fresh fruits and vegetables can replenish the body’s loss of water, to maintain the nasal cavity in good condition is helpful. Turn on the air conditioning at night nose dry attention to improve indoor humidity. Keep the nasal cavity moist and supplemental water can achieve good results, if the symptoms do not get better it is recommended to consult a doctor in a timely manner to detect nasal diseases.