Sinusitis (a sinus infection) can make you miserable with nasal congestion, a cough, facial pressure, and thick nasal discharge.
Your sinuses are hollow cavities found within your cheekbones, around your eyes, and behind your nose. They’re usually filled with air, and they produce mucus that normally drains down the back of your throat without you noticing it. Mucus helps moisten and warm inhaled air and trap particles like dust and allergens.
When something blocks the sinuses and prevents mucus from draining normally, it can build up. This creates a breeding ground for viruses and bacteria, and a sinus infection can occur.
There are two basic types of sinusitis: acute sinusitis and chronic sinusitis.