Thanks you for asking this question. I have undergone through your question. I understand your concern.Two large, thin layers of tissue called pleura separate your lungs from your chest wall. One layer wraps around the outside of the lungs. The other layer lines the inner chest wall. Between these two layers is a small space (pleural space) that s usually filled with a very small amount of liquid. Pleurisy occurs when the pleura becomes irritated and inflamed. As a result, the two layers of the pleural membrane rub against each other like two pieces of sandpaper, producing pain when you inhale and exhale. The pleuritic pain lessens or stops when you hold your breath. Causes of pleurisy include: viral infection, such as the flu (influenza), bacterial infection, such as pneumonia, fungal infection, Rheumatoid disease, such as rheumatoid arthritis, pulmonary embolism after surgery and certain medication. Surgeons worry about patients with breathing problems after surgery, primarily because of the concern over blood clots that go to the lung (pulmonary embolism). If your doctor felt that the pleurisy had any infectious origin, you would have been prescribed an antibiotic, as well. If you start to experience fever, chills, or worsening shortness of breath, you need to follow up with your primary care doctor. Regardless, pleurisy does get better with the right treatment in time. I hope this information will help you I wish you a good health