I have a sharp pain in my lower left lung, around what seems to be the perimeter of the lung. It worsens when I lay down on my left side and I cant exhale without pain erupting. Last fall I was diagnosed with Pericardial Catch Syndrome. But now I think it may be something more.
Thanks for your question on Chat Doctor. I can understand your situation and problem. By your history and description, possibility of pleurisy is more. Pleurisy is inflammation of pleura. And it is seen mostly with lung infection. So we need to first rule out lung infection in your case. So get done clinical examination of respiratory system and chest x-ray. You may need antibiotics, antihistamines and anti-inflammatory Chat Doctor.  Application of warm water pad on affected areas is also helpful. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.