I have sleep disturbances for more than three years.Sleep Problems Because I lost weight three years ago due to depression then lost weight.i lost body fat whole the body especially in my face,cheeks has been sunken.  Since then I have not been able to sleep because while sleeping face down,not able to sleep because of sunken face so I slept with keeping pillows in stomach with doing so made the neck strained,And now my head is always tight and having headache constantly.i have a doubt now whether my constant headache and tightness is due to neck strain or lack of sleep? please answer me.