Hi welcome to health care magic.... You have smoking history positive and now left smoking that is good... But previous damage occurred by smoking esp. If fibrosis developed than it can t be reversible... Your detail history of smoking duration and fever, drug history, weight loss etc has to be taken... Investigate with chest x ray and auscultation first.... If needed Spirometry can be done to assess severity, if COPD changes present... According to cause than further specific treatment can be guided Your bruise at needle site could be thrombophlebitis, ice application and heparin gel useful Consult pulmonologist for examination and further work up