Fibrinous pleuritis is an inflammation of the pleura, the thin membrane surrounding the lungs. This condition is characterized by the accumulation of fibrin, a protein involved in blood clotting, on the pleural surfaces. It often occurs due to infections, such as pneumonia, or other conditions like tuberculosis or autoimmune diseases. Symptoms of fibrinous pleuritis may include chest pain, difficulty breathing, and a dry cough. Diagnosis typically involves imaging tests like chest X-rays or CT scans, along with analysis of pleural fluid if present. Treatment focuses on addressing the underlying cause and may include medications such as anti-inflammatories or antibiotics.