How come I always feel sick when I don't sleep?

Question

ive went through a few sleepless nights and i would like to know why i always feel sick in the morning? :p

Answer 1

Restless nights can lower your immune system's ability to protect you. Also you are tired and your central nervous system is overworked.

Answer 2

maybe its because your not getting any sleep

just a guess..

Answer 3

If you check your question, you'll realize you answered it with the question.

Now thats messed up