Can pleurisy be caused by being overweight and out of shape?

Pleurisy /overweight: I understand your concern, At age 31, likely cause of Pleurisy is Infection. Overweight does not cause Pleurisy. Please see your physician for Diagnosis and treatment. Have Balanced Diet with protein, carbohydrates, less Fat, Minerals, Vitamins and Anti-oxidants starting at 1500 Cal/day; Exercise including Weight lifting; push and pull movements of the muscles; and Stress Management.