What exactly does this mean?
how do u treat it?
how do u know u r suffering frm it?

I experienced a nervous breakdown a few months ago and basically it's a complete shut down of the mind and body.  Outside stresses impact the mind and body to the point where they are no longer capable of absorbing the stress nor can they make sense anymore of what to do to eliminate the enormous pressure created by the stress.  The mind overloads and there are constant thoughts racing through it all the time and the thoughts jumble one into another until nothing makes any sense and the person feels an incredible need to make it all stop or escape all the noise and clutter in the mind.  The body also takes a tough beating because the mind is so full that it won't sleep, forgets to feel hungry, feels hopeless and just full of despair.  All of this leads to everything shutting down.  The mind suddenly goes blank, the body is exhausted and collapses into sleep for days or longer and the person cannot function.  Depending on what brought on the breakdown it may take the person several weeks or months or even years to recover mentally.  Some people never recover and stay "blank" always.  It's a very traumatic thing and treatment can involve medications like anti depressants or anti psychotics and a lot of psychological therapy.  What's scary is that it sneaks up on a person.  Little things mount and mount until it feels like every little thing is a big thing and then before you know it, it feels like a black hole is sucking all rationality away and by then it's probably too late.  Hope this description helps you understand this better.

I had one of those a few months ago I couldn't read or think of anything as it would be to painful,
with really sharp headaches. And its all cause by stress and depression.

I had one a few years back (2004). It was so dibilatating. I ended up waking every night at 3am, not being able to go back to sleep and going to work tired.
The only way out for me was to believe that there was a higher power that I could turn to to help me through this. And in the end, it took a lot of praying and facing up to the problem before I could change.

But for those who think they are suffering from one, be warned. The light at the end of the tunnel will make you strong. Don't lose hope.

I couldn't come out of it on my own, I was too far gone.  Thankfully, there was one thing that I was able to hold on to through all the turmoil which made me go get help. My love for my kids.  Even though I just wanted to rock myself into oblivion and escape life, motherhood was the one thing that threw me a straw to grab onto.  I just couldn't comprehend not interacting with my kids now that one is grown and in college and the other is almost grown.  I thank my Higher Power for knowing exactly what would give me the strength to fight back.