Grief counseling is a form of psychotherapy that aims to help people cope with grief and mourning following the death of loved ones, or with major life changes that trigger feelings of grief (e.g., divorce).
Grief counselors believe that everyone experiences and expresses grief in their own way, often shaped by culture. They believe that it is not uncommon for a person to withdraw from their friends and family and feel helpless; some might be angry and want to take action. Some may laugh.
Grief counselors know that one can expect a wide range of emotion and behavior associated with grief. Some counselors believe that in all places and cultures, the grieving person benefits from the support of others. Further, grief counselors believe that where such support is lacking, counseling may provide an avenue for healthy resolution. Grief counselors believe that grief is a process the goal of which is “resolution.” Grief counselors also believe that where the process of grieving is interrupted, for example, by the one who is grieving having to simultaneously deal with practical issues of survival or by their having to be the strong one who is striving to hold their family together, grief can remain unresolved and later resurface as an issue for counseling.
More information about this disorder can be found at WikiPedia.