Sinus problems in the winter can be prevented by taking a few simple steps. First, keep your nasal passages moist by using a humidifier or vaporizer in your home. Drinking plenty of fluids can also help to keep your nasal passages clear of mucus. Additionally, it is important to keep your face and forehead warm during cold weather by wearing a scarf or hat. In addition, avoid allergens that can trigger sinus problems, such as dust, smoke, and pet dander. Lastly, use a saline nasal spray or neti pot to help clear your nasal passages. Following these steps can help to reduce your risk of developing sinus problems during the winter months.