you have not change under insomnia articles symptoms of insomnia can be caused by or can be co morbid with it should read causes and co morbidities symptoms of insomnia may be caused by or can be co morbid with or may not happen as it depends on individuals please edit it as it is quite silly to put the cause as it can happen let me post you a question does it mean that if you have stress in life means you will have symptoms of insomnia i have friends who experience high stress in work but that doe not mean he will get insomnia in fact he sleeps like a pig please justified this statement