Dry Air
Low humidity and dry air in your house can also cause your sinuses and nasal passages to become irritated and dry. This is especially common during the summer or hot days in other seasons. Also, turning on the heater or central heating system in your living space in winter months can bring the same effects for your nose. While it is often a minor issue that can be alleviated easily, nosebleeds can occur due to a lack of humidity, particularly in cold weather. [3]
