Anxiety Doesn’t Speak — It Hides in the Body: 10 Signals to Watch For
Reading time: 11'

Anxiety Doesn’t Speak — It Hides in the Body: 10 Signals to Watch For

Louise W Lu

Written by

Louise W Lu, PhD, MPH, BMLS

Alexandra V Goldberg

Written/Reviewed by

Alexandra V Goldberg, Registered Dietitian

Anxiety Is Often Not "In Your Mind" — It’s Your Body Calling for Help

Let’s look at an example from one of our students:

She is sixty-five years old.
During the day, she often feels uneasy, with an indescribable tightness in her chest.
At night, she falls asleep only to be awakened by a wave of night sweats — her pillow and undershirt soaked through.
Many nights, she wakes up at 3 a.m. and can’t fall back asleep.

She says her stomach has become increasingly sensitive lately —
the moment she feels nervous, she rushes to the bathroom; her stomach feels bloated, and she loses her appetite.
Every morning, she wakes with a deep fatigue,
her limbs weak, muscles sore, as if she were a machine that never truly rested.

Her hospital test results all read “normal.”
But she knows something is wrong.
She isn’t “sick,” yet her body torments her every day.
— This is the somatisation of anxiety.
Scientific Perspective:
When we feel anxious or under stress, our brain automatically activates an ancient defense mechanism — the sympathetic nervous system.

It accelerates the heart rate, makes breathing shallow, and tightens the muscles, while suppressing digestion, sleep, and immune function.

When this state is short-lived, it protects us;
but when anxiety lingers too long, the sympathetic system’s “gas pedal” gets stuck — and the constant release of cortisol, the so-called “stress hormone,” puts the whole body into a state of chronic tension and depletion.
In other words, anxiety isn’t because you “overthink.”
It’s your nervous and hormonal systems speaking to you — through your body.

Today, we’ll explore —
When anxiety hides within the body, what signals does it send?
And more importantly, how can nutrition and diet help us rebalance these signals?

 


 

Why Anxiety Turns into Physical Pain

We often think of anxiety as something that happens in the mind—
but in truth, it’s a full-body experience.

When we feel worried, tense, fearful, or under pressure,
the brain’s inner alarm system — the amygdala — is the first to wake up.
Its job is to detect danger. Once it senses a threat,
it immediately flips the body’s ancient switch for “fight or flight.”

This activates an ancient biological system —
the sympathetic nervous system (SNS).

It’s the very mechanism that helped our ancestors survive in the wild —
the body’s most instinctive and loyal “guard system.”
Back then, this reflex kept us alive when facing predators or danger.
Today, the real threats are fewer,
but our internal alarm system still faithfully stands guard.

The sympathetic nervous system is like the body’s automatic defense commander,
preparing the entire system for action within seconds:

Fight or Flight Response Diagram
Illustration: How anxiety activates the sympathetic nervous system and triggers the “fight or flight” response
  • Heart rate increases: to send more oxygen and energy to the muscles.
  • Breathing becomes faster and shallower: to take in more air for quick reaction.
  • Muscles tighten: preparing for defense or escape.
  • Digestion pauses: because “eating” isn’t the priority right now.
  • Sweating increases: to cool the body and prevent overheating.

If this response is short-lived — like braking suddenly or feeling pre-speech jitters —
the body quickly returns to balance afterward.

But in modern life, our “threats” are not tigers or storms.
They are endless work stress, family responsibilities, emotional strain, and information overload.
These stressors have no clear end point.

As a result, the brain keeps sounding the alarm,
and the sympathetic nervous system stays switched on.
The body remains in a state of readiness — but never truly rests.

  • Constantly elevated heart rate → that uneasy pounding in your chest;
  • Slowed digestion → bloating, loss of appetite, or nausea;♀️ Muscle tension → stiff neck, sore shoulders, headaches;
  • Disrupted sleep system → trouble falling asleep or waking up too early.
When your body stays in “battle mode” for too long,
pain, tightness, and fatigue become the language of anxiety.

 


 

When the Sympathetic System Keeps Sounding the Alarm, Cortisol Takes Over

When anxiety lasts for too long, the brain doesn’t just stay “tense.”
It also activates a deeper, more complex network —
the Hypothalamic–Pituitary–Adrenal Axis (HPA Axis).

This system works like the body’s hormonal command center.
The hypothalamus in the brain sends out instructions,
passes the message through the pituitary gland,
and finally signals the adrenal glands to release a key hormone —
cortisol.

Cortisol is the body’s “stress hormone.”
In moments of crisis, it keeps us awake, alert, and ready to react.
But when that crisis never truly ends,
cortisol becomes the chemical memory of chronic anxiety.

In short-term stress, cortisol actually helps us:

  • Increases alertness — helping us stay focused and responsive;
  • Provides quick energy — by raising blood sugar for immediate use;
  • Temporarily suppresses inflammation — preventing excessive immune response.

However, when this state continues for weeks, months, or even years,
the brain and body begin to believe that the “danger” hasn’t gone away.
Cortisol levels remain chronically elevated.

Illustration of chronic high cortisol effects
Illustration: When cortisol stays high for too long, the body slowly burns energy like a “low fire.”

Chronically high cortisol acts like a slow-burning fire —
quietly draining energy and disrupting the body’s natural rhythm:

Tip: On mobile, swipe left or right to view the full table →

System Long-Term Effects of Cortisol Typical Symptoms
Nervous System Disrupts melatonin release and sleep-wake cycles Difficulty falling asleep, night waking, light sleep
Muscular System Breaks down protein for energy, leading to fatigue Muscle soreness, weakness, morning exhaustion
Digestive System Slows intestinal movement, alters gut microbiome Bloating, diarrhea or constipation, loss of appetite
Immune System Suppresses immune defense and alters inflammation Frequent colds, skin allergies
Endocrine System Interferes with insulin and sex hormone balance Menstrual irregularities, worsened menopausal symptoms
When you feel constantly tired, irritable, can’t sleep well, or get sick easily,
it’s not because you’re weak —
it’s because your cortisol has been working overtime.

So when your body starts showing those “unexplained discomforts,”
it’s not all in your head —
it’s your nervous and hormonal systems trying to tell you:
“I’ve been overloaded for too long.”

Next, let’s look at —
the 10 most common physical signals of anxiety,
and how listening to them can help you restore balance and calm.

 


 

10 Body Signals of Anxiety — What Your Body is Trying to Tell You

Anxiety is not always a “feeling in your head.”
More often, it’s your body speaking for you.
These ten common body signals are how anxiety manifests physically —
each with its biological cause, real-life experience,
and gentle nutrition-based ways to support recovery.

Tip: On mobile, swipe left or right to view the full table →

Signal & Underlying Cause Typical Experience & Body’s Message Nutrition & Lifestyle Support
Heart Palpitations / Rapid Heartbeat
Triggered by over-activation of the sympathetic nervous system — the body preparing for “fight or flight.”
Sudden racing heartbeat, chest tightness, shallow breathing.
At night, you can feel your heart pounding in your throat.
Before a meeting or a phone call, your chest tightens and hands tremble.
Your body is saying: “I’m on alert all the time.”
Increase magnesium & potassium (leafy greens, avocado, nuts)
Support energy with Health Life® CoQ10 Ubiquinol or VIKPRO SUPER CoQ10
Pair with Health Life® NMN Ultimate + PQQ for mitochondrial resilience
Insomnia / Night Waking
Caused by disrupted cortisol rhythms and suppressed melatonin release.
Difficulty falling asleep, waking at 2–3 a.m., light or restless sleep.
Thoughts won’t stop running before bed; mornings feel unrefreshed.
Your body is saying: “I can’t fully relax.”
Add tryptophan-rich foods (tofu, pumpkin seeds)
Support GABA & serotonin balance with PNZ™ Nervactiva® (GABA + 5-HTP)
Use AE™ DreamEase Sleep Blend for calming aroma or warm compress relaxation
Digestive Upset
Due to stress-induced suppression of gut motility and gut–brain axis imbalance.
Bloating, diarrhoea or constipation when anxious.
Stomach “tightens” before leaving home or facing pressure.
Loss of appetite and sensitivity to certain foods.
Your body is saying: “I’m too tense to digest.”
Eat slowly and mindfully, avoid meals during high stress
Rebuild gut flora with Health Life® Broad Spectrum Probiotics
Pair with PNZ™ N3PUFA™ DHA + Phosphatidylserine (PS) to support the gut–brain axis
Neck & Shoulder Tension / Headaches
From chronic muscle contraction and reduced blood flow during prolonged stress.
Tight neck, tension headaches, “band-like” pressure around the head.
Ache worsens after long computer work or emotional strain.
Your body is saying: “I’ve been holding it together too long.”
Add calcium & magnesium (tofu, spinach)
Support energy metabolism with CoQ10 Ubiquinol or NMN + PQQ
Apply AE™ DreamEase Sleep Blend warm compress on the neck and shoulders
Shortness of Breath / Chest Tightness
Caused by overactive breathing centres and tense chest wall muscles under anxiety.
Shallow breathing, chest pressure, frequent sighing.
Feeling “I can’t get a deep breath” during stress.
Your body is saying: “I need more space to breathe.”
Practise the 4-7-8 breathing method
Take PNZ™ N3PUFA™ DHA + PS to stabilise nerve transmission and calm the body
Chronic Fatigue / Low Energy
Due to prolonged activation of the HPA axis and elevated cortisol levels draining cellular energy.
Feeling tired even after sleep, “afternoon crashes,” loss of motivation.
Both emotional and physical energy run low.
Your body is saying: “I’m exhausted.”
Increase high-quality protein (eggs, legumes, whole grains)
Support with CoQ10 UbiquinolNMN + PQQLipo-Sachets® Vitamin D3NYO3® Liposomal Vitamin C Powder
Morning sunlight for 10 minutes resets cortisol rhythm
Cold Hands & Feet / Sweating
From sympathetic overdrive causing peripheral vasoconstriction.
Sweaty palms during stress, cold extremities even in warmth.
Fatigue and poor circulation in winter months.
Your body is saying: “I’m burning energy just to keep warm.”
Gentle aerobic activity (walking, stretching)
Support circulation with Aulando® Deer Velvet Extract
Pair with PNZ™ N3PUFA™ DHA + PS for vascular balance
Abdominal Pain / IBS
Linked to hypersensitive gut–brain signalling and serotonin imbalance.
Cramping, bloating, diarrhoea during stress.
Discomfort after meals or “nervous stomach.”
Your body is saying: “I’m too sensitive to stress.”
Try a low-FODMAP diet
Add NYO3® Digestive Daily Probiotic
Peppermint oil capsules to ease spasms
Menstrual Irregularities / Hormonal Fluctuations
Chronic cortisol elevation disrupts the HPO (hypothalamic–pituitary–ovarian) axis.
Delayed or painful periods, hot flushes, PMS intensification.
Anxiety or sleep loss worsens hormonal symptoms.
Your body is saying: “I’m overloaded.”
Keep consistent sleep–wake cycles, reduce caffeine
Support hormones with PNZ™ N3PUFA™ DHA + PS and Health Life® Sea to Sand Calcium D3K2
Include antioxidant foods (blueberries, green tea)
Irritability / Mood Swings
Due to low GABA and serotonin levels, combined with unstable blood sugar.
Snapping over small things, mood swings, sudden tears at night.
Feeling out of control or emotionally fragile.
Your body is saying: “I’m at my limit.”
Eat regular balanced meals to stabilise blood sugar
Support neurotransmitter balance with PNZ™ Nervactiva® (GABA + 5-HTP)
Pair with PNZ™ N3PUFA™ DHA + PS to support emotional calm

 

Authors:

Louise W Lu

Louise W Lu

Registered Nutritionist (NZ Reg. 82021301), PhD of Nutrition Science, Honorary Academic at the University of Auckland. Louise blends clinical research with public health to help people eat better and live stronger.

All Posts  •  Website

Alexandra V Goldberg

Alexandra V Goldberg

Registered Dietitian (NZ Reg. 20-02273) and expert in nutrition, medicinal chemistry, and skincare. Alexandra helps clients reach their health goals with science-backed strategies in post-op recovery, feeding tolerance, and weight management.

All Posts  •  Website

Leave a comment