Because something is probably wrong and they should see a doctor.
if you have bad breathe or lots of Flem it does cc>
yes sometimes like if you have a cold your cough helps to spit the flem out and it makes you better
You don't taste or smell 'blood', your coughing may irritate your lungs and the irritation may have you taste what you think is blood. As for the smell, you could be smelling the flem. The flem gets that kind of smell after being to much of an irritant to your lungs or throat.
If you spit up blood you need medical treatment as soon as possible.
because blood/spit contains cells
They spit blood out there eyes by putting their eyes behind their head and use heat to draw blood out their eyes.
No, they just are parasitistic as they suck your blood. They leave bumbs because they injected a toxin to stop blood clotting and keep the blood flowing. Some people may be allergic to them, but I doubt there are tons of people that are.
no
Yes, go to the doctor and he will tell you what to do next. Spitting blood is a problem.
There are no Iguanas that 'spit blood'. I think you're referring to the horned lizard - which, as a defence mechanism, has the ability to rupture the blood vessels at the corner of its eyes - shooting a stream of blood at an attacker.
If there was blood in the mouth, they would probably spit it out if they didn't want it. They wouldn't do so for any other reason in common legend.
Bjarte Flem was born in 1958.