Afrin is a brand of nasal spray that contains the active ingredient oxymetazoline, which is a decongestant. It is commonly used to relieve nasal congestion caused by allergies, colds, or sinusitis. The spray works by constricting blood vessels in the nasal passages, leading to reduced swelling and improved airflow. Typically, Afrin is used for short-term relief, as prolonged use can lead to rebound congestion, where symptoms worsen after stopping the medication. It is important to follow the recommended dosage and consult a healthcare professional if symptoms persist or worsen.