Dry sinuses are characterized by overly dry sinus passageways, which can cause pain and discomfort. In a healthy nasal passageway, a liquid substance called mucus flows freely and coats the passageway. This helps limit sinus irritation and keeps the passageway moisturized as usual. When the nasal passages are not properly lined with this mucus layer, it can lead to swelling, sinus infections, and nosebleeds. Dry sinuses is a common condition but can be very uncomfortable and frustrating. However, the troublesome symptoms can be alleviated at home and under the care of an ear, nose, and throat doctor. In cases where dry sinuses are causing severe pain or lead to other conditions, other treatment options might be necessary.