Sinus infections or the frequency of sinus attacks can be prevented to a certain extent. The best way is to avoid cold and bacterial infections by avoiding places that have too much humidity. This can be done by installing humidifiers in the room, keeping the humidity levels ideally at 45-50%. The air should not be too dry. If the air is too dry, you can try breathing through a moist towel. Air conditioners also have air purifying systems that do not allow bacteria to grow.
Some people are more likely to have a sinus attack if they are susceptible to allergies. People who are prone to sinus attacks should avoid pollutants like cigarette smoke and even alcohol. They should also avoid places like swimming pools that have chlorine-treated water since chlorine increases nasal irritation. Other things to be avoided are dust, pollen, mold, or any foods that trigger allergies. There are many tests to determine the vulnerability to certain irritants.
Drinking a lot of water and other fluids every day would also help to combat sinus infections. Rest is also required. Avoid using too many over-the-counter medications, as these can augment the level of infection if not diagnosed properly.