In order to give consideration to the effects of moisturizing, beauty maintenance, and disease elimination, many people like to add essential oil, vinegar, isatis root, and other "ingredients" to the humidifier. This practice is unscientific and more likely to cause respiratory diseases.
The substances that can really be used for treatment and act on the lungs must be water-soluble, fat-soluble, have a certain number of particles, and can be combined with alveolar epithelial cells to be absorbed by capillaries.
Essential oil, isatis root, and vinegar are also foreign matter to the lung if they can be released into the air through the humidifier, which will aggravate the symptoms of asthma, emphysema, and other diseases, and even lead to allergic pneumonia.