After reading the following verses from Job ch:30,  I have come to the conclusion that he suffered chronically with depression.  I know I may be stating the obvious but I beleive that there are depression sufferers out there who could really relate to the deep feelings of pain and grief that he describes so intensely here:

I am sick at heart! Pain has taken its toll. Night chews at my bones, causing endless torment and God has shrunk my skin, choking me to death.  I have been thrown in the dirt and now am dirt myself. I beg God for help, but there is no answer; and when I stand up, he simply stares. God has turned brutal, stirring up a storm to toss me about.  Soon He will send me home to the world of the dead, where we all must go.

No one refuses help to others when disaster strikes.  I mourned for the poor and those who suffered.  But when I beg for relief and light, all I receive is disaster and darkness.  My stomach is tied in knots; pain is my daily companion.  Suffering has scorched my skin, and in the city I stand and cry out, making mournful sounds like jackals and owls.  My skin is so parched, that it peels right off, and my bones are burning.  My only songs are sorrow and sadness.   JOB 30: v16-31

*If you read through to the end of Job you find that only in his complete surrender, acceptance of his life situation and humility to God was he then healed and blessed with good fortune.  Now Ive decided to try this for myself and see what happens.

But its any wonder God ignored him.. boy could he whinge and whine!