It depends on how hard or soft you have hitted your head
If you see a blue mole anywhere on your body you should have it checked. A mole that is blue, brown or black could be a sign of cancer and should be addressed immediately.
If you are wearing black or blue socks, wash your socks in hot water to get rid of the excess dye. Or perhaps your shoes are too tight. If that's not it, then you should see a doctor. Tomorrow. Maybe even tonight.
hi again, i got the black DSi but you should get the blue one.
Black shirt
it will turn black and blue, do not try and take it off yourself, you may cause an infection, a doctor or nurse should do that for you.
Black or Blue
hi again, i got the black DSi but you should get the blue one.
Dragon and Azreal
Any other color of light is absorbed by the object. Only the blue bounces off of it. And if there's no blue in the light that's hitting it, then it appears black.
A vet.
Blue and red or red and black or blue and black. But I actually think it should be red and black.
blue or black