Part of the grief process is feeling sad or numb, feeling a lack of interest in pleasure and having difficulty concentrating. In fact, one the stages of bereavement can include a time of angry reactions several times a day. These are just a few of the characteristics of grief that mirror the symptoms of depression. Often the depressing emotions associated with grief include anger. This is because grief beat a person down from confidence to a sense of being vulnerable and unable to handle even small stressors. This poses a problem because life is full of unavoidable stressors.
The result is that men and women experiencing grief can be angry much of the time. The anger is a spin off of feeling overly stressed and frustrated. This low stress-tolerance is a spin off of the sorrow of loss.
Recently, I noticed that there are anger management worksheets available that can help a person in bereavement to work with their anger. For some examples of anger management worksheets and how to use them see the anger management worksheets by Dr. Greg Hamlin.