Why We Don’t Notice What Our Nervous System Is Telling Us Until It’s Too Late
Understanding Interoception, Emotional Regulation, and the Signals We Miss
There was a period when my son was young when he would suddenly become irritable, reactive, or lash out for what seemed like no obvious reason. At first, I looked at the behavior. Then I started noticing a pattern: it happened when he needed to use the bathroom.
He was not intentionally being difficult. His body was sending him a very real internal signal, but he did not yet understand what that sensation meant or what to do with it. The discomfort would build until it came out somewhere else. Once I recognized the pattern, I could help him recognize it too. Instead of focusing only on the behavior, I could begin connecting what he was feeling in his body with what his body was actually asking for.
That is interoception.
Interoception is the nervous system’s ability to detect, interpret, and respond to signals coming from inside the body. It includes sensations related to hunger, fullness, thirst, bladder pressure, breathing, heart rate, temperature, fatigue, gut activity, muscle tension, pain, and internal emotional arousal.
Most of us assume that if the body is sending a signal, we will automatically know what it means. That is not always true.
The Body Can Know Before the Mind Does
A child’s bladder can be full before they consciously recognize the urge to use the bathroom. Their body can be getting hungry before they identify hunger. Their heart rate can increase, breathing can change, muscles can tighten, and their nervous system can become increasingly activated before they have any idea that they are becoming overwhelmed.
Adults do this too. We may say, “I suddenly got angry,” “I don’t know why I am anxious,” or “I was fine and then I just snapped.” But dysregulation rarely begins at the exact moment we notice it. The nervous system may have been signaling increasing demand for minutes, hours, or even days.
The problem is that many of us have never learned how to recognize the earlier signals.
You Can Be 45 Years Old and Still Not Know What Stress Feels Like in Your Body
Dr. J once had a conversation with a husband and wife who were going through a very difficult season. The husband was carrying an enormous amount of stress. He was running a business, raising five children, grieving the loss of someone close to him, and navigating significant strain within his marriage.
Yet when Dr. J began asking him where he actually felt emotion or stress in his body, the man struggled to answer. He understood intellectually that he was stressed. He could describe everything happening in his life. But he had very little awareness of what that stress actually felt like inside his own body.
Was his chest tight? Was his breathing shallow? Was his stomach tense? Were his shoulders elevated? Did he feel pressure behind his eyes? Was his jaw clenched? Did his heart feel different? He genuinely did not know.
That is something many adults never learn. We become very good at thinking about our lives without necessarily becoming good at feeling what our nervous systems are experiencing inside those lives.
Stress Does Not Stay Contained Inside One Person
What made that conversation even more important was that the stress was not occurring in isolation. His wife was highly empathetic. So was one of their sons. The marriage was under strain, the father was carrying enormous internal pressure, and their young son was experiencing significant anxiety.
This does not mean the father’s stress “caused” his son’s anxiety. Human beings are more complicated than that. But nervous systems live in relationship.
Children notice tone, pace, facial expression, body tension, silence, conflict, urgency, withdrawal, predictability, and countless other signals. Sensitive children may detect these changes incredibly quickly, even when no one has explained what is happening.
The son may not have understood the business stress, grief, or marital strain intellectually, but his nervous system did not need the whole story. It was receiving information from the environment.
This is where interoception and co-regulation overlap. To regulate well with other people, we first benefit from knowing what is happening inside ourselves.
Emotions Are Not Just Thoughts
We tend to talk about emotions as though they exist only in the mind, but emotions have a physical component.
Anxiety may be experienced as a racing heart, tight chest, nausea, tingling, restlessness, pressure, or shallow breathing. Anger may come with heat, muscle tension, jaw clenching, increased heart rate, or changes in breathing. Sadness can feel heavy, hollow, tired, constricted, or physically painful. Even excitement can produce many of the same physiological changes as anxiety.
The nervous system is constantly coordinating the body in response to what we experience, and interoception helps the brain make sense of those changes. When interoceptive awareness is limited, someone may recognize the emotion only after the physiological state becomes intense.
That is when we get the experience of going from “fine” to overwhelmed with very little warning.
The Earlier You Notice, the More Choices You Have
Nervous-system activation usually builds gradually. At first, the signals may be subtle. Breathing changes slightly, the shoulders tighten, hunger appears, the body becomes more restless, patience decreases, or concentration becomes more difficult.
If those signals go unnoticed, the nervous system may continue escalating. Irritability increases, thoughts become less flexible, sensory input becomes harder to tolerate, and a person may speak more sharply, become impulsive, withdraw, or feel desperate for relief.
Eventually, the signal becomes impossible to ignore. That may look like yelling, crying, panic, shutdown, a headache, or reaching for food, caffeine, a phone, or some other quick way to change the internal state.
The earlier we recognize what is happening, the more regulatory options we have available. That is one of the greatest benefits of interoceptive awareness.
Children Often Need Someone Else to Help Translate Their Body
This is what happened with my son. He was experiencing the internal signal, but he did not yet have the neurological maturity or experience to interpret it correctly.
So I became part of that process.
Over time, instead of simply reacting to the behavior, I could help connect the sensation to meaning. I could say, “Your body feels uncomfortable. Do you think you need to use the bathroom?”
Eventually, he began making that connection himself.
This is how so much self-regulation develops. At first, someone else helps us notice. Then someone helps us name what we are feeling. Eventually, we begin recognizing the signal independently.
A parent might say, “I notice you’re getting really wiggly. Does your body need movement?” or “Your voice is getting louder and your body looks tense. Do you feel something changing inside?”
This is not about constantly analyzing a child. It is about helping them build a vocabulary for their own nervous system.
Some People Feel Too Little. Others Feel Everything.
Interoception is not simply about having too little awareness. Some people have difficulty noticing internal signals until they become very strong, while others notice every change.
They may be extremely aware of their heart beating, small shifts in digestion, breathing changes, temperature, pain, or internal sensations. That heightened awareness can sometimes contribute to anxiety because the brain notices the signal but may misinterpret what it means.
A racing heart could mean excitement, exertion, fear, caffeine, dehydration, or simply increased activation. The signal itself is not the entire story. The brain must interpret it.
That is why healthy interoception is not simply “feeling more.” It is developing a more accurate relationship with what we feel.
What Does the Brain Have to Do With It?
Internal signals travel through several pathways, including sensory nerves, spinal pathways, the vagus nerve, and the brainstem. From there, information is integrated through several brain regions, including the thalamus, insula, anterior cingulate cortex, hypothalamus, and other areas involved in awareness, emotion, autonomic regulation, and decision-making.
The insula is particularly fascinating because it helps the brain create a representation of what is happening inside the body. In very simple terms, the body sends information and the brain asks, “What does this mean?”
That interpretation helps shape what happens next. Do I need food? Do I need rest? Do I need to use the bathroom? Am I afraid? Am I angry? Am I becoming overwhelmed? Am I safe? Should I move? Should I stop?
The accuracy and timing of that process matter enormously.
Interoception Is Part of Regulation
This is why interoception belongs in the nervous-system conversation.
Regulation is not simply the ability to calm down after we become overwhelmed. Good regulation also includes recognizing that overwhelm is building in the first place.
The better we become at noticing subtle shifts in our internal state, the earlier we can respond. A child may learn to recognize hunger before becoming irritable. An adult may learn to recognize tension before snapping at their spouse. A teenager may notice their breathing and heart rate changing before anxiety becomes panic. A parent may recognize that they are entering the house carrying significant stress and take a few minutes to settle before walking into the family’s evening.
These may seem like small things, but neurologically they are enormous.
Common Signals We Often Miss
Interoceptive signals can show up in very ordinary ways. For one person, stress may first appear as jaw tension or shallow breathing. For another, it may be stomach discomfort, restlessness, headaches, irritability, or feeling unusually tired. Hunger may first show up as poor concentration rather than a clear empty-stomach sensation. The need to use the bathroom may show up as agitation in a child before they can identify bladder pressure.
Learning our own patterns is part of developing better interoceptive awareness.
The goal is not to obsess over every sensation. It is to become more familiar with the body’s earlier signals so we do not always have to wait until the nervous system is shouting.
What Do We Do When the Nervous System Is Struggling to Read Itself?
At Purpose Driven Chiropractic, we are interested in the quality of communication between the brain and body.
The nervous system is constantly receiving information from the joints, muscles, organs, skin, vestibular system, and internal environment. That information has to be received, filtered, interpreted, and used to create an appropriate response.
This is one reason we use neurological scans to look at autonomic regulation, muscular activity, and stress patterns. We want to understand how the nervous system is functioning beneath the symptoms someone is experiencing and whether the system appears to have enough capacity to adapt to what is being asked of it.
Chiropractic adjustments provide specific sensory input through receptors in the joints, muscles, and surrounding tissues. That information travels into the spinal cord and brain, where it contributes to sensory processing, movement, prediction, and autonomic regulation.
In simple terms, the adjustment gives the brain new information from the body and is intended to improve the quality of communication between the brain and body. Our goal is not to tell someone what emotion they should feel or force the nervous system into a particular state. We want to create better conditions for the nervous system to organize, adapt, and respond.
Awareness Gives Us an Opportunity
One of the most powerful things about learning interoception is that it changes our relationship with behavior.
Instead of asking, “Why did I suddenly lose it?” we can begin asking, “What was my nervous system telling me before I got there?” Instead of asking, “Why is my child acting like this?” we might ask, “What could their body be trying to communicate?”
We can also become more curious about what happened before the behavior. Was the child hungry, tired, overstimulated, in pain, needing the bathroom, anxious, or carrying tension from the environment? Did the adult enter the interaction already overloaded?
The goal is not to blame the body for behavior or excuse every reaction. It is to understand the nervous system well enough that we have more opportunities to intervene before capacity is completely gone.
Your Nervous System Is Talking All Day Long
Most of us were taught to identify colors, numbers, letters, and shapes long before anyone taught us how to recognize the sensations inside our own bodies.
Yet our nervous systems are communicating with us constantly. Sometimes those signals are subtle, and sometimes they become impossible to ignore.
Learning to recognize them earlier can change the way we understand hunger, stress, anxiety, emotional regulation, parenting, relationships, and even ourselves.
Because sometimes the question is not, “Why did I react that way?”
The better question is, “What was my nervous system trying to tell me before I reacted?”
