Winter allergy symptoms are the same symptoms that patients experience during other parts of the year. People often experience nasal congestion or stuffy nose, runny nose, itchy nose, sinus pressure, sneezing, postnasal drainage down the back of their throats, and itchy or watery eyes. Although there are not many grasses, trees, or weeds pollinating during the winter, there are plenty of other airborne allergens that can cause symptoms during the winter months. These primarily include indoor allergens that are present throughout the year, such as pet dander, dust mites, cockroach, and mouse. No matter how clean we all keep our homes and workspaces, environmental allergens are still present and can result in allergy symptoms.