If you spit up blood you need medical treatment as soon as possible.
Yes, go to the doctor and he will tell you what to do next. Spitting blood is a problem.
yes
Go to the hospital as quickly as possible!
Of course not!
yes
Because of the increase blood volume circulating in the body, there is more blood going to the tongue and salivary glands then there will be increased in saliva production.
because blood/spit contains cells
mouth bleeding. or you're coughing it up. Get checked for Tuberculous's ("T.B.") ASAP
They spit blood out there eyes by putting their eyes behind their head and use heat to draw blood out their eyes.
I hate to be the bearer of bad news, but most likely yes.
no
serious issue my friend