Over-the-counter nasal sprays and drops are beneficial in treating some instances of nasal congestion and sinusitis, according to EverydayHealth.com. If the nose is dry, mucus flow is impeded, sinuses back up and a sinus infection ensues. Nasal spray can keep moisture in the nose to stave off these potential problems.
Nasal congestion may also block the drainage of the middle ear, which can result in ear infection, warns EverydayHealth.com. In addition, breathing through the mouth due to the nose being congested can worsen conditions such as bronchitis or asthma. Moisture from decongestant nasal spray can prevent and treat nasal congestion. Salt-water or saline nose drops thin the secretions in the sinuses and nose and encourage the removal of germs and particles. These products keep germs and allergens moving before they have time to cause inflammation.