What will happen to your vein when you were taken out some blood?

I dont mean about influencing my blood test(coz it wont,i checked),but like is it going to be harder to find a vein or blood ...

I am having lots of blood clots and I bleeding a lot but it only happens in the moring after 12 I dont bleed no more intill t...

FROM MY TOUNGE =/ I think. it bled for about 5 hrs. & now it stopped with a home remedi. but it hurts and its all purple. do ...

Just curious, what happens if someone doesn't fast before a blood test? They don't get the results they want and do it again?...

I've just come on my period and strangely my blood is like brown :s help!

Are there certain blood types that aren't compatible that can cause issues with the child, like retardation or anything of th...

So like usually I can't see them at all but I woke up today and I could see like ALL of the veins in my hands and wrists and ...

my veins often hurt, I dont know if its high blood pressure or what its is, but its really annoying, is there anythin I can d...

I just happen to look at my hand and the blueish green vain on top is kind of long :l Just curious if that's a good thing or ...

I had to get blood work done to check my thyroid levels or something, I've gotten it done before but have never felt as sick ...