They also make mucus, a fluid that helps warm the air you breathe and add moisture to it. A build-up of mucus and other secretions makes a good place for germs to grow. A cold that starts to get better and then gets worse may be a sign of a sinus infection. Pain that is on only one side of your face or pain that starts when you lean forward can also be a sign of acute sinusitis. Other symptoms include a fever, thick green or yellow nasal mucus, and an ache in your upper teeth.
Some sinus infections get better on their own.
Sip hot liquids and drink plenty of fluids. Apply moist heat by holding a hot, wet towel against your face or breathe in steam. Rinse your nasal passages with salt water to remove excess mucus. Mix well in a clean, empty squeeze bottle. Squirt the salt water into each side of your nose for several minutes three or four times a day.