Decongestants are a type of medicine that can provide short-term relief for a blocked or stuffy nose (nasal congestion). They work by reducing the swelling of the blood vessels in your nose. This helps to open up the airways.
But do you know: Using decongestant nasal sprays for more than 3-4 days can cause worse nasal congestion, called rebound rhinitis, once the spray wears off.
After a few days of use, the blood vessels don’t respond to the medication anymore. You spray away, but your problem just gets worse. Don’t overuse nasal sprays.