Special air filters, called high-efficiency particulate air filters and electrostatic filters, can be helpful in reducing irritants inside buildings. Some climates are worse than others for people who have chronic sinusitis. The damp weather in northern areas is usually the worst. Changes in air pressure can also cause symptoms in some people. For example, some people with chronic sinusitis feel worse just before a rainstorm, when the air pressure is changing.
Steam can be very helpful in relieving congestion.
You can use steam inhalations with or without astringents such as eucalyptus, pine oil or menthol. Simply breathing in the steam from a cup of hot water works. You can also place a damp cloth heated in the microwave over your face, but make sure you don't burn yourself. Humidifiers are helpful, especially in the colder months. They help prevent drying, irritation and swelling of the membranes lining the sinuses and nose.