Nasal sprays are liquid medications delivered through the nose to treat various conditions. They can help relieve symptoms of allergies, colds, or sinus infections by reducing inflammation and congestion. Common ingredients include saline, steroids, and antihistamines, depending on the specific purpose of the spray. These sprays are easy to use and provide quick relief. Users simply insert the nozzle into one nostril, spray, and breathe in gently. Proper technique is important for effectiveness, and it's essential to follow the instructions provided with the product to avoid side effects or complications.