H20 Level

This doesn’t come from any scientific journal I’ve read or is some exhaustive research I’ve discovered it just comes from an intuition that kept me up at night.  What is your H20 level? For a person is roughly 60 % water and I wonder if sometimes sickness or weaknesses occur in one’s body when that level goes below that mark?  Our unborn lives were covered in this substance for 9 months (give a take a week) so I wonder how healthy is it when we deprive our body of this substance? Could an ache or pain in a back or shoulder be cured with an infusion of pure water where the pain is produced?  Is it possible that pure clean water can flush out many other forms of sickness and disease? Who knows all I can say is this topic makes me very thirsty so I’m going to increase my level right now and know I’ll feel a whole lot better if not refreshed.