Medically reviewed by John Carew, MD Fact checked by Jillian Dara Nasal sprays can treat congestion and other symptoms of seasonal allergies or a cold. They work by delivering a fine mist of ...

"But a multi-symptom cold medicine like DayQuil or NyQuil may be best for multiple severe ... [Afrin] are also effective, but they should only be used for three days max, as overuse can worsen ...

Also, do not use this medication for more than 3 days or it may cause a condition called rebound congestion. Symptoms of rebound congestion include long-term redness and swelling inside the nose ...