Sleeping with the air conditioner is likely to be due to a dry environment, viral infections, bacterial infections and other reasons. 1. Dry environment: Because the air conditioner itself has a dehumidification function, continued long time to open the air conditioner will cause the indoor humidity to reduce significantly, resulting in dry indoor air, which leads to dry throat when sleeping. It is recommended to drink more water, reduce air conditioning time, more ventilation, air change is mostly can return to normal. 2. Viral infections: As a result of prolonged opening of the air conditioning often leads to a large temperature difference between indoor and outdoor, many times back and forth in and out easily due to the body’s inability to quickly adapt to the temperature difference, reduced immunity to viral infections caused by colds and flu, appearing dry throat, runny nose, fever and other symptoms. 3. Bacterial infection: If the air conditioning temperature is too low, usually leads to a decline in the patient’s immunity, may be induced on the basis of viral infection bacterial infection, dry throat, sore throat, fever, headache and other symptoms. So if the symptoms of sleeping with the air conditioner on dry throat, it is recommended to adjust the air conditioning time and temperature according to the situation in a timely manner, and if necessary, go to the hospital for further examination to clarify the diagnosis.