Reason why any person suffer from sleepless nights when they are in depression.

Maybe... and I think other reasons could be because of lack of sleep because concentrating on something else like avid reading, too much gaming or distracted by watching TV, DVDs and many more. There are lots of distractions in this world..so to have sleepless nights or days for others.. may be because of depression or just purely distract. But if it stems out totally from depression, might be a bigger fit though, in my opinion too..

depression can cause a decrease of serotonin level into our brain. This serotonin hormone is a hormone that makes us sleep..due to its decrease when one is depressed you will suffer from insomnia...I think you should treat depression first by going to a counseling...by then you may be able to increase your serotonin level through therapy and medications perhaps...that depends upon your condition..

I don't get sleep untill very late, I definitely am an Insomniac. I am depressed? Well, I really don't know that bit. I am sad at times yeah I would agree to that.

Yeah, as you said, when people are suffering from depression, they will be sleepless. I am a girl who will often be sleepless at night. This really bothers me a lot. I do not know how to deal with it. I just can not fall aleep.

Maybe because when you re feeling that way, you, your brain or your system cant relax enough , so you find that its really difficult to sleep well at first.