1. Pericarditis is inflammation of the pericardium and is usually caused by viral or bacterial infections. It can occur acutely or become chronic.
2. The main symptoms are sudden onset of sharp chest pain that worsens with breathing or coughing. A pericardial friction rub may also be heard on examination.
3. Treatment focuses on relieving pain and inflammation, usually with NSAIDs. Corticosteroids may be used for refractory cases or certain causes like connective tissue diseases.