Sinusitis is a condition characterized by inflammation of the sinuses, which are hollow cavities in the skull. These cavities are lined with a thin layer of mucus-producing tissue. When the sinuses become inflamed, this can lead to symptoms such as nasal congestion, facial pain or pressure, headache, and a runny or stuffy nose.

There are several types of sinusitis, including:

1. Acute Sinusitis: This type lasts for a short duration, typically less than four weeks. It often occurs as a result of a respiratory infection, such as a cold or flu.
2. Subacute Sinusitis: This type lasts between four to 12 weeks, and the symptoms may persist longer than in acute sinusitis.
3. Chronic Sinusitis: This type lasts for 12 weeks or more and may be caused by an infection or other factors that lead to persistent inflammation, such as nasal polyps or a deviated septum.
4. Recurrent Sinusitis: This refers to multiple episodes of sinusitis within a year.

Common causes of sinusitis include viral infections, bacterial infections, allergies, and anatomical factors like a deviated septum. The symptoms can vary but often include:

• Nasal congestion
• Facial pain or pressure
• Headache
• Postnasal drip
• Cough
• Fatigue

Treatment depends on the underlying cause. Acute sinusitis caused by a viral infection often resolves on its own, and treatment focuses on relieving symptoms. Chronic sinusitis may require more comprehensive management, including antibiotics if a bacterial infection is present, nasal corticosteroids, decongestants, and possibly surgery in some cases.

If you suspect you have sinusitis or are experiencing persistent sinus symptoms, it's advisable to consult with a healthcare professional for an accurate diagnosis and appropriate treatment.