Grief is a natural response to a loss, often to the death of a loved one.  Grief can also occur if a person suffers a symbolic loss, such as a child that has been disowned by a parent.  Additional examples of loss include the loss of a job, loss of health, or loss of perceived youth.  Grief can feel similar to depression but it is generally short-termed.  There is no prescribed method of grieving, people grieve in different ways.  

Many people find it helpful to seeking counselling when they are grieving.  It provides the opportunity to work through the loss with somebody who is non-judgemental.