Mourning is a process of preparation and resolution of a loss for which all pass at some point in life, with greater or lesser success. It can be a process of regulatory evolution, and may also evolve in a pathological way.
When it runs through all the steps, it can be said that there is a certain maturity and improvement of the character and personality of the individual, but the difficulties can mean and result in medical and / or psychiatric complications.
The steps according to Kubler Ross: denial, anger, bargaining, depression and acceptance. They are essentially a reference to the psychotherapeutic work.
The mutual aid and self-help are a means of high efficiency co intervention aimed at supporting this and other problems such as the problems of dependence on alcohol or drugs, eating disorders, etc..