👉 Concerned fluid, also known as pleural fluid, is a clear or slightly white liquid that accumulates in the space between the lungs and the chest wall, known as the pleural cavity. This fluid plays a crucial role in lubricating the lungs and preventing friction during breathing. However, when there is an excess of fluid, it indicates a condition called pleural effusion, which can be caused by various factors such as heart failure, lung infections, or malignancies. The presence of concerned fluid in the pleural cavity can lead to symptoms like shortness of breath, chest pain, and reduced lung capacity, necessitating medical evaluation to identify the underlying cause and appropriate treatment.