According to WebMD, decrease sinus infection symptoms by keeping mucus membranes moist through drinking enough water and using a humidifier. Additionally, avoid common irritants, and keep the surrounding environment well-ventilated.
WebMD states that sinus inflammation can be relieved through keeping a home thoroughly humidified as well as drinking adequate fluids. If necessary, people can moisten their sinus membranes by using a neti pot and washing their nasal cavity with a mild saline solution.
WebMD also points out, however, that avoiding common triggers which cause sinus infections is better than trying to alleviate the symptoms once a person has one. For many people, these triggers include stuffy air, pet dander, cigarette smoke, perfumes and cleaning chemicals.