Medicine and science are constantly progressing, and we’ve come a long way compared to 200 years ago; however, there are still a lot of things that we know very little about and have trouble explaining — for example — these seven extremely weird medical conditions.

1 weird medical conditions

Blue Skin Disorder – Did you know there’s an extremely rare disorder which can turn your skin blue? This happens because oxygen levels in the blood start to decrease, causing the skin to appear dark blue with a purple tint. Thankfully, there is a treatment for this condition. The person pictured above is one of the rare people with this disorder known to public.