Pleurisy, or pleuritis, designates the presence of fluid between the two layers of the pleura, in other words the membrane lining the chest cavity that acts as a protective wall surrounding the lungs. When the fluid building up in this space is pus, the condition is defined as purulent pleurisy. This is, in most cases, a secondary complication of bacterial pneumonia or tuberculosis. The primary symptoms are fever, sharp pains in one side of the chest, and a generally poor condition complete with great fatigue, loss of appetite, and so on. Treatment consists of draining the pus by means of suction tube, washing out the pleural space, and administration of antibiotics.