Lack of sleep does cause your immune system to be weaker so yes.
it's much more likely that the lack of sleep itself is not the cause of the suicidal thoughts, but is another symptom of depression. But, yes, lack of sleep can cause one to feel meh, and possibly simulate depression.
Lack of sleep can be the cause of many things including ulcers. They have been known to cause both gastric ulcers and mouth ulcers.
A lack of sleep makes it more likely to have a heart attack or stroke, but is not known to actually cause one.
stress,depression,lack of food, lack of water, smoking, drinking,
lack of sleep
Yes
Lack of sleep because of stress in ones life could be a cause of grey hair. Anything stress related can cause gray hair.
I am assuming you mean "how does a lack of sleep effect your eyes?" Low levels of sleep will cause redness in the whites of the eyes and will cause you to get dark circles under the eyes.
No. I rarely sleep and I've never fainted. I guess it may be able to, but not likely.
Lack of sleep can cause people to get groggy or crabby during the day. It can also affect some peoples growth or immune system.
What happens is that you will be cranky, have bags under your eyes, and a headache.