Is blood vomit dangerous??

Kay so I've been feeling very icky today. At 1 am I vomited, and it was just normal. Then again at 4 and it was normal again....

Im bulimic(for ten months now)...recently I have found blood in my vomit... Is it serious or could it be that I just scratche...

I don't cough up blood but im wondering are there any diseases or problems which cause you to cough up blood, one that isn't ...

Is there a blood clot that is not so dangerous and may easier to dissolve ?

I want to sell my blood but 1st I want to know if its dangerous? Can I I die from it? Also how much would they give me? D...

Has this ever happened to anyone and if so is it serious to where I should be in a hosital or getting help?

I got sick on the bus . What should I take it this ?

If someone had a blood transfusion, can they give blood? Because when I was born, I had a blood transfusion, so can I give bl...

Can you pass a blood test for thc and how

This may sound stupid but here we go. can you give blood while taking iron pills?