I've just got the results from my recent chest CT scan, and it's mentioned that there are fibrotic scars in the left upper lobe of my lung with post-inflammatory sequel changes. I'm a bit worried and curious if this is something serious or could it be considered normal?

Fibrotic scars in the left upper lobe of your lung, described as post-inflammatory sequelae, typically result from past infections or inflammation. While it's not uncommon, its important to monitor and follow up with your doctor for any further management or assessment to ensure it doesn't affect your lung function.