The nose has many positive effects on the air you breathe in that you may not be aware of. - Temperature regulation - Filtration and removal of particulate matter - Humidification - Defense against infections There are several things you can do to help keep your nose healthy. Foremost is nasal hygiene. This will help with your nose's natural function and keep it moist and healthy. Techniques to accomplish this are outlined below. These will help with nasal dryness, nasal crusting, and nose bleeds. They also assist with clearing thick mucus that cause you to blow your nose frequently and may be associated with thick postnasal drip.