Air humidity is a quantity indicating the amount of water vapor in the air. The ideal air humidity should be between 30% and 50%. Human health is affected by the humidity in the air. Humidity should not be too high because it creates favorable conditions for many pathogenic microorganisms to develop and should not be too low because it causes dry skin and irritation of the respiratory tract mucosa.

Humidifiers help reduce problems caused by dry air such as sinusitis, chapped lips, and nosebleeds. In addition, humidifiers can help reduce symptoms of colds and other respiratory illnesses.

Air humidity is a measure of the amount of water in the air. Air humidity has many effects on human health, including patients with chronic obstructive pulmonary disease.

Changing weather is difficult, asthma patients should limit exposure to high humidity environments to limit the onset and worsening of clinical symptoms of the disease. Humidity in the air inside the house should be maintained between 30% and 50%. When the weather becomes humid, asthma patients should stay indoors, close the windows and turn on the air conditioner.