I can provide some information on the topic.
Dissociative Identity Disorder (DID), formerly known as multiple personality disorder, is a complex and controversial psychiatric condition characterized by the presence of multiple distinct identities or personalities within one individual. These alternate identities are often referred to as "alters."
Alters can vary in their level of activity and presence. Some alters may be more dominant and present for longer periods, while others may be less active and remain dormant for extended periods. The duration of dormancy can vary widely from person to person and may range from a few days to months or even years. The reasons for dormancy can be complex and may depend on individual factors and life circumstances.
There are several possible reasons for alters to go dormant:
Coping mechanism: Alters might emerge in response to traumatic experiences or overwhelming emotions as a way to cope with the distress. When the external stressors diminish or the person finds healthier coping mechanisms, some alters may go dormant.
Integration: Therapy and personal growth can lead to the integration of alters. Integration refers to the process in which distinct identities become more unified, leading to a more cohesive sense of self. As integration occurs, some alters may become less active or eventually merge with other identities.
Safety and stability: Alters might go dormant when the person feels safe and secure in their environment. If external stressors decrease or support systems improve, some alters may not be as necessary for coping.
Memory barriers: Alters can be associated with specific memories or aspects of the person's life. If these memories are less relevant or less triggered, the related alters might become dormant.
It's essential to understand that DID is a highly complex and individualized condition, and each person's experience can be different. If you or someone you know is dealing with DID or experiencing difficulties related to alters, seeking professional help from a mental health provider experienced in working with dissociative disorders can be beneficial. They can provide appropriate support and guidance tailored to the specific needs of the individual.