Pleural thickening is a medical condition where the pleura, the thin membrane surrounding the lungs, becomes thicker than normal. This thickening can occur due to inflammation, infection, or exposure to harmful substances like asbestos. It may lead to reduced lung function and discomfort. Symptoms of pleural thickening can include shortness of breath and chest pain, although some individuals may not experience noticeable symptoms. Diagnosis typically involves imaging tests such as chest X-rays or CT scans, which help visualize the extent of the thickening and determine the underlying cause. Treatment options vary based on the cause and severity.