Medically reviewed by Anju Goel, MD Dry air can worsen allergy symptoms like a stuffy nose, sore throat, and cough. A humidifier adds moisture to the air by releasing mist into a room, which can help ...

A cool-mist humidifier can help maintain skin moisture ... which can run from $10 to $20. Ultrasonic cool-mist models—the majority of units in CR’s ratings—use small vibrating diaphragms ...