Why Your Nervous System Keeps Resetting to Dysregulated

You meditate. You practice breathwork. You work on regulating your nervous system. It helps, sometimes noticeably, but after a while the tension, reactivity, or sense of overwhelm comes back.

When that keeps happening, adding another regulation technique may not be the first thing to consider. It may be more useful to ask what your nervous system is responding to in the first place.

I’m Dr. Kenny, an IFM-certified functional medicine practitioner. A large part of my work involves looking for physiological factors that may be contributing to persistent symptoms alongside the psychological and nervous system work a patient is already doing.

What you’ll learn in this blog and video

Why nervous system techniques can help without necessarily producing lasting changes
Why recurring dysregulation may involve more than the nervous system itself
Three areas I consider when symptoms keep returning despite consistent regulation work
Why psychological and physiological factors often need to be addressed together

Why the effects of regulation techniques may not last

Breathwork, meditation, somatic techniques, and other regulation practices can produce real physiological changes. If they help you feel calmer or more regulated, that improvement is not imaginary.

The question is why the effect sometimes does not last.

One way to think about this is a thermostat. A thermostat responds to the temperature it detects in the room. You can temporarily change what the sensor detects, but if the temperature in the room remains the same, the thermostat eventually responds to it again.

Your nervous system is obviously much more complicated than a thermostat, but the analogy is useful. A regulation technique can change your physiological state in the moment. If something else continues to activate the stress response, however, your baseline may gradually return.

So when someone repeatedly improves and then returns to the same pattern, I do not automatically assume they need a better breathing exercise. I want to know what else may be contributing to the stress response.

Looking beyond the nervous system itself

The nervous system does not operate independently from the rest of the body.

Immune activity, hormones, sleep, infection, psychological stress, environmental exposures, medications, metabolic health, and many other factors can influence autonomic function. That means persistent dysregulation should not automatically be reduced to either a psychological problem or a nervous system problem.

Research by O’Connor and colleagues describes the relationship between stress and two major physiological systems: the autonomic nervous system and the hypothalamic-pituitary-adrenal, or HPA, axis. These systems interact with immune, metabolic, and endocrine processes, particularly when stress becomes chronic.

This is why I look at the broader clinical picture when regulation techniques repeatedly help but the improvement does not hold. The technique may be doing exactly what it is supposed to do while another factor continues to influence the patient’s baseline physiology.

Three areas I consider when symptoms keep returning

There is no single explanation for persistent nervous system symptoms. The following are three areas that may be worth considering depending on the patient’s history, symptoms, and clinical findings.

1) HPA axis and cortisol patterns

The HPA axis is one of the body’s major stress-response systems. Cortisol follows a daily rhythm, generally rising around waking and changing throughout the day. Chronic stress, illness, sleep disruption, medications, and other factors can affect that pattern.

I do not assume that an abnormal cortisol result explains someone’s symptoms by itself. When testing is appropriate, I look at it alongside the patient’s history, symptoms, sleep, medications, metabolic health, and other relevant findings.

Consider discussing this with your provider: If cortisol testing is clinically appropriate, ask what type of testing would actually answer the question being investigated. A single serum cortisol measurement and a multi-point assessment of cortisol across the day provide different information and are not interchangeable.

2) Ongoing immune activation

Another area worth considering is whether an infection, post-viral condition, inflammatory process, or other immune stressor is contributing to symptoms.

There is evidence that immune activity can affect neurological and autonomic function. Research published in Cell, for example, investigated mechanisms associated with post-acute sequelae of COVID-19 and found that reduced circulating serotonin was linked to persistent viral inflammation, altered tryptophan absorption, platelet activity, and impaired vagal signaling.

That is a specific finding in a specific disease context. It should not be generalized to everyone experiencing nervous system dysregulation. But it demonstrates something clinically important: physiological processes outside the nervous system can influence pathways involved in autonomic regulation.

Consider discussing this with your provider: If your symptoms began or changed significantly after an infection, make sure that timing is part of your medical history. Whether additional evaluation is appropriate depends on your symptoms and clinical context.

3) Environmental exposures

I also ask about the patient’s environment when the timing of symptoms suggests a connection.

For example, if someone consistently feels better while away from home and worse after returning, I want to know more about the environment. That does not prove mold, a biotoxin illness, or any other specific diagnosis. There are many possible explanations for an environment-related pattern.

But a consistent change associated with a particular building, workplace, or location is still useful information. Depending on the situation, it may justify investigating indoor air quality, allergens, dampness or water damage, sleep conditions, occupational exposures, or other environmental factors.

Try this: Instead of assuming what the cause is, track where you are when symptoms improve or worsen. If a pattern appears repeatedly, bring that information to your provider.

Integrity note: This post is educational and does not constitute medical advice, diagnosis, or treatment. The patterns discussed here can help identify questions worth investigating, but they do not establish the cause of an individual’s symptoms. Work with a qualified healthcare provider to determine what evaluation is appropriate for you.

Psychological and physiological factors both matter

Looking at physiology does not mean ignoring the psychological side of chronic stress or illness.

In practice, I often see better progress when patients address both.

Chronic illness itself can become psychologically exhausting. Unpredictable symptoms, fear of another flare, disrupted sleep, uncertainty, changes in work or relationships, and repeated periods of improvement followed by setbacks can all increase stress.

At the same time, physiological stressors such as illness, inflammation, sleep deprivation, pain, or hormonal changes can affect mood, cognition, and autonomic function even when someone does not feel psychologically stressed.

These influences interact. I do not find it useful to force patients into a choice between “this is psychological” and “this is physical.” In many cases, both deserve attention.

This is also why I still use and recommend appropriate nervous system regulation practices. Breathwork, relaxation exercises, movement, meditation, and other techniques can be useful while the broader clinical picture is being evaluated. They do not need to cure the underlying problem to have value.

Research into interventions that influence vagal and autonomic activity is continuing to develop. Some studies have reported promising effects on autonomic symptoms and inflammatory pathways, but the evidence varies considerably depending on the intervention and condition being studied. Small studies and short follow-up periods also make it difficult to draw broad conclusions about long-term outcomes.

The practical point is simple: use the tools that genuinely help you, but do not assume that temporary improvement followed by recurring symptoms means you are doing them incorrectly.

First steps you can start this week

Track when you feel better and when symptoms return. Include sleep, illness, workload, emotional stress, medications, menstrual or hormonal changes when relevant, travel, and changes in your physical environment.
If symptoms began after an infection or major health event, make sure your provider knows the timeline rather than discussing each symptom separately.
If cortisol or other stress-related testing is being considered, ask what clinical question the test is intended to answer and how the result would affect your care.
Continue the regulation practices that reliably help you. Temporary benefit is still benefit. At the same time, recurring symptoms may be worth evaluating in the context of your broader health history.

Key takeaways

Nervous system regulation techniques can produce real benefits even when those benefits are temporary.
If symptoms repeatedly return, it may be useful to look beyond the technique itself and consider other physiological and psychological factors.
Hormonal patterns, immune activity, illness history, sleep, medications, psychological stress, and environmental factors can all be relevant depending on the individual.
A pattern associated with an infection, environment, or other specific event is useful clinical information, but it does not establish the cause by itself.
Psychological and physiological factors often interact. Addressing one does not require dismissing the other.
Regulation tools can remain useful while the reasons for persistent or recurring symptoms are being investigated.

Keep Learning

If you have been doing the nervous system work and still find yourself returning to the same symptoms, the next step may be to look at the broader pattern. In the free training, I walk through how I approach that investigation in practice and what I consider when deciding where to look next.

Watch the Free Training

Answered by Dr. Kenny Mittelstadt, DACM, DC, FMCP
Functional medicine practitioner and Root Cause Health Detective helping people uncover the hidden patterns behind fatigue, gut issues, hormone imbalances, and other unresolved health mysteries.