Why do my fingers, toes & especially the skin underneath my nails turn purple/blue? 😖 Help?

Jxpxtxr
So I just actually noticed it now, looking at this picture (really bad to tell, I know) I took this morning (lol don't ask) but yeah they actually might have been purple/blue-ish for quite a while now - my hands and feet are often really cold & I have very low blood pressure so could it just be that?
Any ideas what might cause this? Also how do I get rid of this? Looks like I'm kinda sick, eww😒..
Why do my fingers, toes & especially the skin underneath my nails turn purple/blue? 😖 Help?

Actually the picture doesn't even do any justice to the purple-ness.. T_T
Why do my fingers, toes & especially the skin underneath my nails turn purple/blue? 😖 Help?
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