What happens in the body during an anxiety spike

The autonomic nervous system has several divisions. The two we are focusing on in this article are the sympathetic nervous system and the parasympathetic nervous system.

The sympathetic nervous system is the branch responsible for the fight, flight or freeze response. It activates when the body detects threat, raising the heart rate, sharpening attention, and directing resources toward survival. The parasympathetic nervous system is the counterpart. It is the branch responsible for rest, recovery, and a sense of safety. Under normal conditions, these two branches work in balance. However, under sustained or acute stress, the sympathetic branch can dominate, and the body stays in a state of heightened alertness even when no immediate threat is present.

It is worth noting that anxiety does not always look like heightened alertness. For some people, an anxiety response can move in the opposite direction towards shutdown, numbness, or a sense of disconnection. Both are nervous system responses to perceived threat, albeit expressed differently.

A helpful way to understand this is through what Daniel Siegel calls the window of tolerance. It is the zone of optimal arousal within which a person can think clearly, feel without being overwhelmed, and engage with their experience. When anxiety pushes the nervous system outside that window, whether into hyperactivation or hypoactivation, the capacity to think clearly and access insight is reduced. The parts of the brain responsible for rational thinking and perspective become less accessible because the system has prioritised survival over reflection.

Grounding techniques work by helping the nervous system return to the window. They activate the parasympathetic branch, signal safety to the body, and support the nervous system in settling back into that regulated state. When that happens, clearer thinking becomes possible again. Grounding techniques do not directly resolve what is underneath the anxiety. However, utilising them creates enough regulation to allow us to access what is underneath it.

Three techniques worth trying

What works differs from person to person. These three techniques are a starting point, not a prescription. The most important thing is finding what works for you.

1. Extended exhale breathing

Why it works: The exhale activates the vagus nerve, which is the primary pathway of the parasympathetic nervous system (the branch responsible for rest and recovery). A longer exhale than inhale signals to the body that the threat has passed and the body begins to downregulate the stress response.

How to try it:

1. Find a comfortable position, seated or standing
2. Breathe in slowly through the nose for four counts
3. Breathe out slowly through the mouth for six counts
4. Repeat for three to four rounds
5. After each round, pause briefly and notice whether the body feels slightly less heightened

The ratio matters more than the specific numbers. An exhale that is meaningfully longer than the inhale will begin to activate this response.

2. Tactile grounding through noticing texture

Why it works: Anxiety narrows our attention inward towards thoughts, sensations, and worries. Touch redirects attention outward, to the immediate physical environment. This interrupts the anxious thought loop and brings the nervous system back to the present moment.

How to try it:

1. Without reaching for anything new, notice what your hands are already in contact with
2. The fabric of your clothes, bag, or the surface of the chair, whatever is within reach
3. Explore the texture slowly: is it soft or firm? Smooth or slightly rough? Warm or cool?
4. Stay with the sensation for a few moments, noticing as much detail as you can
5. If the mind wanders back to the anxious thoughts, gently return attention to the texture

The key is sustained attention. The longer you stay with the sensation, the more the nervous system has a chance to settle.

3. Humming for vagal activation

Why it works: The vagus nerve passes through the larynx and pharynx. Humming produces vibrations that directly stimulate vagal tone, activating the parasympathetic nervous system and signalling safety to the body. It is one of the most accessible and underused grounding tools available.

How to try it:

1. Begin with any hum. Note: there is no correct note or tune
2. As you hum, notice where you feel the vibration
3. Gently try to feel the vibration move from the head down into the chest, where the pitch is lower and the vibrations are felt more deeply
4. Continue for three to four rounds, pausing between each to notice how the body feels
5. Once it becomes familiar, try humming a tune you know well. This adds a layer of personal meaning that makes the technique easier to return to

It may feel awkward at first. That is completely normal. Awkwardness often signals something new rather than something wrong.

A note on finding what works for you

These three techniques are a small selection from a much wider range of grounding and coping tools. Not every technique will work for every person, and not every technique will work in every situation. What matters is having something accessible to reach for when the need to regulate arises. What tends to help is taking the time, ideally with support, to discover what that is for you.

If breathing helps but humming does not, use breathing. If texture grounding is the thing that breaks the loop for you, that is the tool worth practising. The goal is not to master all techniques but to find the one or two that feel genuinely usable when you need them most.

These are a bridge, not a destination

Grounding techniques aid with regulation. They help the nervous system return to a state where clearer thinking is possible, where feelings of overwhelm begin to ease, and where the deeper work of understanding and working with anxiety can happen.

But they do not address what is underneath. The patterns, the triggers, the history of a nervous system that learned to stay on alert. That is the work of therapy. And that deeper work of understanding tends to be more effective when the body is regulated enough to receive it.

If you find yourself having to utilise these techniques often, that could be a signal that the anxiety you are constantly experiencing has deeper roots worth exploring in a therapeutic space with the right support.

You can read more about what it looks like when anxiety feels less like a symptom and more like a personality trait in our article here.

When you are ready

At The Calming Ark, you will be met with compassion and not judgement, regardless of where you are starting from. When you feel ready, we would be glad to connect with you.