This refers to situations can remain trapped in a person's mind, stirring up old anger whenever a similar situation happens in the present. The intensity of such anger varies based on how much anger a person "holds on to" without releasing it. For instance, a child who was rapped and could not overcome the pain is always anger when she hears someone has been rapped. Her anger might be so much intense that others may ask if she is related to the person.
Transitory anger deals with onset of anger due to situational occurrences, such as the anger at stubbing a toe or getting stuck in a patch of bad traffic. Such anger usually endures for a relatively short time.
Anger also hides other feelings. Many people unconsciously exhibit anger when they have underlying feelings of hurt or disappointment.
Self Initiated Anger
Additionally, many people show their worst anger when they are mad at themselves.
Hormonal Related Anger
Hormonal imbalances, such as premenstrual syndrome, can cause mild anger in the form of irritability. Anger can also result from imbalances or deficiencies in various brain chemicals, such as serotonin, dopamine or endorphins.
Peoples' long-held or deep-seated beliefs can trigger anger. They may respond as if physically threatened when others attack their belief system. Some people grew up in households with angry parents, so they erroneously adopted angry behaviours as a way to express themselves to others.
Anger Caused by Fear
Fear can also trigger anger. Some people, when they perceive something or someone as a threat, react with anger. This could stem from an evolutionary response where individuals used anger to scare away threatening people or animals as a self defense mechanism.