Dissociative amnesia is when you can’t remember important information about yourself. These memories are often distressing or upsetting events. It’s most likely to happen with severe or long-term trauma, especially experiencing abuse, neglect or violence of any kind. This condition is treatable, and most people can regain their memories.
Dissociative amnesia is when your mind blocks out important information about yourself, causing “gaps” in your memory. One of the most common reasons your mind blocks out things is to protect you from unpleasant, distressing or traumatic experiences. It’s not the same as simply forgetting something. In most cases, you still have the memories but can’t access them.
Dissociative amnesia often happens because of very traumatic experiences, including abuse, war and natural disasters. People with dissociative amnesia have an increased risk of self-harm or suicidal behaviors.
You should get emergency care if you have disturbing thoughts about harming yourself, including thoughts of suicide or harming others. If you have thoughts like these, you can call any of the following:
All your experiences rely on several brain processes and abilities working together. Those include:
Dissociation is a defense mechanism that your mind can use to keep one or more of the above from working with the rest. That can affect how you experience and understand things that happen and what you can remember.
Dissociative amnesia is when dissociation causes memory loss (amnesia).
To understand dissociative amnesia, it helps to know a little bit about how memory works. When you think back on events in your life, you’re using what’s called autobiographical memory. It’s like a library inside your mind where every book is a memory of an event from your life.
To create the memories that fill that library, your brain goes through a step-by-step process:
There are two main ways that dissociative amnesia can work:
Dissociative amnesia is uncommon, but experts also aren’t sure how uncommon it really is. Estimates range from as low as 0.2% to as high as 7.3%. The American Psychiatric Association estimates about 1.8% of people experience it each year worldwide.
The main symptom of dissociative amnesia is memory loss. That memory loss can take different forms. Some people experience just one form, while others have multiple forms. The forms include:
People with dissociative amnesia may also have certain behaviors or traits related to memory loss. Those can include:
Even when people are aware of the missing memories, they’ll usually avoid, minimize or rationalize why they can’t remember.
Dissociative amnesia can happen in connection with one-time, isolated events or long-term stress or trauma. Things that can cause this kind of trauma include:
Stress and traumatic events later in life can also cause dissociative amnesia symptoms to reappear or get worse.
Experts think that multiple factors can increase the risk of developing dissociative amnesia. That’s partly because the risk is cumulative, meaning it goes up when a person has more risk factors. When the trauma is longer-lasting, repeated or more severe, that usually makes this condition worse.
Research also shows there may be a link to genetics. While genes can’t cause dissociative amnesia on their own, they can lower the threshold for it to happen. That means a person with a family history of dissociative amnesia may develop it with fewer contributing factors.
A healthcare provider can diagnose dissociative amnesia based on the symptoms you describe and by asking questions about what you can or can’t remember, what you’re experiencing and details about your life. Your provider may also use a questionnaire designed to help diagnose dissociative amnesia. These questionnaires are like guides or checklists to your provider, helping them as they try to determine what’s affecting you and how severe it is.
If you’re feeling anxious or worried about answering that you don’t know or remember something, it’s okay to tell your provider that. Not remembering something is a symptom of dissociative amnesia and telling them can help them make the diagnosis.
There aren’t any tests that can diagnose dissociative amnesia directly, but some lab, imaging or diagnostic tests are still likely. Providers will often use them to rule out other conditions that could be causing your memory loss. Some of the most likely tests include:
Dissociative amnesia isn’t directly curable, but there are many treatment approaches that might help. One of the first steps is to remove or stop anything that might be causing or contributing to the amnesia. An example of this would be taking military personnel out of situations — especially combat — that might trigger or worsen amnesia. Some people may need care in a medical facility or specialized hospital setting to get the most benefit from this approach.
There aren’t any medications that can specifically treat dissociative amnesia. But many medications can treat associated conditions, like anxiety or depression. Treatment can help if, and when, memories do resurface. For many, the memories they regain are upsetting or overwhelming. Mental health therapy can help you cope with those feelings and manage them in a healthy and safe way.
The treatments that can help you may vary. Your healthcare provider is the best person to tell you about treatment options or approaches. Their recommendations will be the most relevant to your specific situation and needs.
Many people who have amnesia aren’t aware they have it. You might not realize you have memory gaps until someone else asks or mentions something you should remember but can’t. Some people may feel upset, afraid or anxious about this. Others will seem indifferent or unbothered.
Dissociative amnesia can range from mild and limited to severe and disabling. People with dissociative amnesia are more likely to have other mental health conditions, too. Some of the most common examples include:
Most people will regain their memories over time. Treatment can speed up that process and help you manage the effects of regaining those memories, too.
Unfortunately, some people won’t regain their missing memories. While that’s not the case for most people with dissociative amnesia, it does happen. If you’re concerned about this happening, talk to your healthcare provider. They can help you develop coping strategies to manage the feelings you experience surrounding this.
For some people, dissociative anemia may last weeks or months. For others, it may be permanent. Your healthcare provider can tell you more about what you may expect with what’s happening to you.
The outlook for dissociative amnesia is as unique as the person who has it. With treatment, many people can regain their memories, manage the feelings that come with them and continue with life as usual (or nearly so).
The severity of dissociative amnesia often corresponds to the severity of the underlying cause(s) or contributing factor(s). The more severe the trauma that causes the amnesia, the more severe the amnesia and its effects will be.
People with severe dissociative amnesia who don’t recover their memories may find that memory loss disrupts their lives. It can affect their ability to form relationships (romantic and otherwise).
Recovering memories can also come with its own challenges. Some feel overwhelmed and struggle to deal with the feelings and memories. Treatment is critical for people going through this because the risk of dangerous behaviors, including self-harm and suicide, is much higher.
If you have dissociative amnesia, it’s important to remember that this isn’t something you can control. Your mind does this on its own to try to protect you. You also can’t force yourself to remember. Instead, it’s best to focus on being patient. Many people regain lost memories with time.
It’s also crucial for you to feel you can trust your mental health provider. Trust is very important to effectively treating and managing the effects of dissociative amnesia. Not everyone “clicks” with the first provider they see. You may feel discouraged if that’s the case for you early on. But it’s important to remember that this is common, and many people need to see more than one professional before they find someone who’s a good “fit” for their needs and personality.
If you have dissociative amnesia or are worried you have it, it’s a good idea to talk to a mental health provider. They can talk to you about what you’re experiencing and either do an assessment or refer you to a provider for one.
After you see a provider, they can recommend a schedule for follow-up visits. You should also see them if you experience any of the following:
A note from Cleveland Clinic
Dissociative amnesia is a condition that happens when your mind tries to block out important memories about yourself. These memories are often of traumatic or distressing events. The goal is to protect you from the trauma you experienced, but that’s often just a temporary fix. Memory is part of what makes you who you are, so it can feel upsetting or scary to suspect or realize you can’t remember certain things.
You may feel upset, embarrassed or ashamed that you can’t remember specific events. But you also may not be upset by it at all. That’s not a sign that you’re faking or lying about your memory loss.
If you have dissociative amnesia, you’re far from alone. There’s more than a century of research into this condition, and experts can now diagnose it and offer treatment options. That means there’s hope for you to regain your memories and recover from trauma or manage its effects.
Last reviewed by a Cleveland Clinic medical professional on 09/18/2023.
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