You need to understand the environment around you to decide whether you need a humidifier for nosebleeds. 1. If your home or room has low humidity levels, especially during winter, you need to invest in a humidifier.  2. If you have dry air in the environment around your surroundings, you should invest in a humidifier to elevate the moisture levels. 3. If you experience symptoms like dry skin, dry or itchy eyes, and throat irritation, you should consider investing in a humidifier.