<s>[INST] Hi i have previously had 2 spontaneous pneumothorax and ive had a dull slight rash for last few mths which itched occasionaly were the rash was is now a large black bruise exactly wwere i had my 2 chest drains in the past im also getting stabbing sensations in my chest could the same be happening again ? [/INST] Thanks for your question on Chat Doctor. I can understand your concern. We should definitely rule out recurrence of pneumothorax in your case because all your symptoms are seen in pneumothorax. So consult pulmonologist and get done clinical examination of respiratory system and chest x-ray. If chest x-ray is normal then no need to worry about pneumothorax. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>