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Are you a thin, tall person who smokes regulalrly. There is possibility of multiple cystic formation of your pleura which keep rupturing with stress, loud noise, high pressure areas, coughing as well which is causing recurrent pneumothoraces. But usually pain isn't present with an uncomplicated pneumothorax unless there is infection or inflammation. Have other tests been done to rule out TB, Rheumatoid arthritis
, Eosinophilic granuloma
etc. which are common causes of recurring pneumothorax associated with pain. How is your chest X-ray, has a CT scan
been done of your chest. Are your blood counts normal. You need to avoid going in high pressure areas like swimming deep, loud music concerts, coughing, and stop smoking
if you are a smoker as well. Get investigated for the possible causes of recurrent pneumothorax
as well to get relief from these problems.