Why Problems With Regulation Can Cause Severe Physical Symptoms
What “regulation” actually means
Regulation refers to how the nervous system adjusts and stabilizes. It includes arousal (energy level), activation of the stress response, and return to baseline (normal). Regulation is ongoing, happening continuously and automatically. Most of the time, people are not consciously trying to control it.
Regulation is a process, not a state. States themselves can be regulated or dysregulated. When someone is in a regulated state, their system is relatively stable—they are not in an active threat response or a shutdown state. When someone is dysregulated, the system is unstable, and the person may be in a state of heightened threat or shutdown.
The process of regulation refers to how the nervous system adjusts and stabilizes after becoming dysregulated.
When regulation is working well, the body is able to shift and return to a regulated state relatively smoothly. When regulation is not working well, the system may struggle to return to baseline—and symptoms can begin to emerge across the body.
What dysregulation looks like
Dysregulation refers to a state in which the nervous system is not adjusting or stabilizing effectively. When the system is dysregulated, certain actions may become more difficult or even impossible, and the body may not respond in typical ways.
Dysregulation often shows up in two general patterns: activation or shutdown. In some cases, people may move between these extremes. This can be especially noticeable in dissociative systems, where different parts of the system may hold very different nervous system states that become more visible when they are closer to the front.
In an activated state (high arousal or high energy), the nervous system remains “on.” A common example is hypervigilance. The problem is not the vigilance itself—it is that the system is unable to shift out of that state. It makes sense to be alert in a dangerous situation, but when the environment is safe, a regulated system will settle. A dysregulated system may remain activated, continuing to scan for danger even when none is present.
In a shutdown state (low arousal or low energy), the system remains “off.” This may look like someone who appears depressed, has difficulty following a conversation, or experiences a foggy or slowed mind. In this case, the nervous system is not able to re-engage.
It is important to understand that dysregulation involves more than emotions. While it is often described in emotional terms—such as being unable to calm down—dysregulation affects the entire body. For example, during a panic attack, a person may experience rapid heart rate, difficulty breathing, and intense fear at the same time. These are all part of the same dysregulated state.
When regulation is not working well, it doesn’t just affect how you feel—it affects how your body functions.
How dysregulation affects the body
The nervous system affects the entire body. It can influence multiple body systems at the same time. These systems do not operate independently; they are all influenced by the same nervous system.
Some of the key systems impacted by the nervous system, and how that impact may appear, include:
- muscular (tension, weakness, movement problems)
- sensory (numbness, hypersensitivity, altered perception)
- cardiovascular (changes in heart rate, dizziness)
- gastrointestinal (nausea, stomach issues)
- energy systems (fatigue, sudden exhaustion)
Even when these systems are structurally normal—meaning there is no disease or visible damage—their functioning can still be disrupted. This is because the nervous system plays a role in regulating how these systems operate.
When the nervous system is dysregulated, it can affect how the body functions in ways that feel alarming or difficult to explain medically. This can include symptoms such as pain, weakness, temporary paralysis, or dissociative seizures.
Why symptoms can be severe
Dysregulation of the nervous system can produce:
- pain
- paralysis-like symptoms
- dissociative seizures
- extreme fatigue
- difficulty speaking (including an inability to speak)
When it comes to physical problems, people often assume that the severity of symptoms reflects the severity of physical damage. With dissociative symptoms, however, intensity reflects how strongly the nervous system is disrupted. This is why symptoms can be severe even when medical tests do not show a clear cause.
Even though these symptoms do not come from structural damage, they can feel medical in nature. They are the result of functional problems in how the body is being regulated.
These experiences are no less real or distressing.
Why symptoms can involve multiple systems at once
Because the nervous system can affect multiple systems at the same time, dysregulation can lead to effects that are widely spread throughout the body. For example, a person might experience dizziness, fatigue, and sensory changes all at once.
At first glance, these symptoms may seem like multiple unrelated problems. However, in dissociative symptoms, they are often connected. One system, the nervous system, is affecting many different parts of the body at the same time.
Why symptoms fluctuate
Symptoms that are dissociative in nature are often inconsistent. This inconsistency can cause people to wonder if they are imagining things and may lead doctors to discount the experiences.
Symptoms change over time because the nervous system’s ability to regulate also changes. At times when the system is better regulated, symptoms may be fewer, milder, or even absent. At other times, when regulation is more difficult, symptoms may increase.
Other factors can also affect symptoms, including the environment, trauma triggers, and which parts of the system are active.
Symptoms may appear suddenly, disappear just as suddenly, and return later. This fluctuation does not mean the symptoms are imaginary. It reflects changes in how the nervous system is functioning.
Why medical tests often come back normal
It is a common and confusing experience for people with dissociative symptoms to have medical tests come back as normal. This can feel very invalidating, as though the results are saying you are imagining your symptoms. It can also be frightening, because it leaves you with symptoms your doctor cannot explain.
The tests that doctors usually use first are designed to look for structural damage or physical abnormalities. As you now know, these symptoms are functional in nature, not caused by structural problems.
One example of this is dissociative seizures. If a person experiencing dissociative seizures is monitored with an EEG, the test will not show epileptic activity. This is because the cause is not damage or abnormal electrical activity in the brain, but how the nervous system is interacting with it.
Some tests can look at how the body is functioning, but these are not usually the first tests used. In addition, they often measure what is happening in a single moment, rather than how the system is functioning over time.
This is why symptoms can feel very real and severe, even when tests do not show a clear cause.
When tests come back normal, it does not mean that nothing is wrong. It does not mean that you are imagining your symptoms. It means only that no structural cause was found.
A different way to understand these symptoms
Assuming that you have been medically cleared, these symptoms may be dissociative in nature. It can be helpful to shift how you think about them.
Instead of asking, “What’s wrong with my body?”, it may be more accurate to ask how your nervous system is functioning.
These symptoms can be understood as indicators of how the system is operating in that moment. They may reflect dysregulation, rather than structural problems in the body itself.
This does not mean that nothing is wrong. It means that the issue may lie in how the body is functioning, rather than in damage to the body.
These symptoms can also be connected to past experiences in ways that are not always obvious. In trauma, the body and nervous system can hold what are sometimes called implicit memories—patterns of response that are felt or acted out rather than consciously remembered. These responses can be triggered by something in the present, even if it is not immediately clear what the trigger is.
In that way, some symptoms may reflect pieces of your system’s history that are being activated in the moment, even if they don’t feel like memories in the usual sense.
f you want to understand more about how this works, you can read more about implicit memory and trauma here: Amnesia, memory gaps & information barriers in DID
Understanding these symptoms in a new way
Severe physical symptoms can occur without structural damage when the nervous system is not regulating effectively.
This does not make the symptoms less real. It reflects how the body is functioning in that moment.
When symptoms are understood this way, they can begin to make more sense. They are not random, and they are not imagined. They are connected to how the nervous system is responding and adapting.
What may feel confusing or inconsistent can often be understood as changes in how the system is functioning over time.
Explore More:
This is one example of how dissociation can affect the body. To learn more about the range of somatic experiences and why they occur, see: Why Your Body Can Have Severe Symptoms Even When Medical Tests Are Normal
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