Hi, im 28 and 12 years ago i had my BCG vaccination which i think is for tuberculosis. Over the past week i noticed my white round scar becoming hard and red, today i was in the bath i put pressure on my arm to look at it and it burst with more green pus than i have ever seen! Its still swollen, and where the puss came from has formed a bloody scab. Anyone have any idea why this has happened and why its happened 12 years later? Ive never had any hassle with it before. Any ideas would be appreciated as i have been lookin everywhere and found nothing
12 years later BCG vaccination scar swells up and oozes puss? 
