There is a particular kind of exhaustion that doesn't show up on any blood test. You sleep, technically. You eat, mostly. You exercise when you can. And yet there is a persistent, bone-deep tiredness — a kind of friction in the way you move through the world — that no amount of reasonable self-care seems to touch.
For many women, this tiredness is anxiety. Not the heart-pounding, hands-trembling anxiety of popular imagination, but the quieter, more pervasive kind that lives in the body for years before it's recognised for what it is.
We tend to talk about anxiety in psychological terms — worry, overthinking, fear — but anxiety is profoundly physical. It is a full-body state, driven by the nervous system, expressed through the muscles, the gut, the hormones, and the immune system. And because women are far more likely to experience anxiety than men, and far more likely to have their physical symptoms attributed to stress, hormones, or simply being a woman, the body's anxiety signals frequently go unheard, untreated, and unnamed.
This is a guide to the physical language of anxiety — and how to begin listening.
The Biology Behind the Body's Response
Anxiety is, at its core, a survival mechanism. When the brain perceives a threat — real or imagined, physical or psychological — it triggers the hypothalamic-pituitary-adrenal (HPA) axis, releasing cortisol and adrenaline. These stress hormones prepare the body to fight or flee: heart rate increases, blood is redirected from the digestive system to the muscles, the immune system goes on alert.
This response is adaptive in genuine emergencies. The problem arises when it becomes the default state — when the threat is not a predator but an inbox, a deadline, a difficult relationship, or simply the accumulated weight of too much responsibility for too long. In chronic anxiety, the stress response is perpetually activated, even at low levels, and the body pays the price.
Understanding this physiology matters because it explains why anxiety produces such a diverse and seemingly unrelated constellation of physical symptoms. The whole body is involved. And the whole body suffers.
The Physical Signals Most Often Missed
Persistent Jaw Tension or Teeth Grinding
The jaw is one of the first places anxiety takes up residence in the body. Grinding teeth at night (bruxism), clenching during the day, persistent jaw soreness, or tension headaches radiating from the temples are all common physical manifestations of chronic anxiety. Many women spend years visiting dentists about tooth damage or GPs about headaches before anyone connects the dots to their stress levels.
Digestive Disruption
The gut-brain axis is one of the most well-established relationships in neuroscience. Anxiety directly affects gut motility, stomach acid production, and the composition of the gut microbiome. The result is a digestive system that is, under chronic stress, perpetually dysregulated. Symptoms include irritable bowel syndrome (IBS), nausea, bloating, constipation, diarrhoea, or an ongoing sense of stomach unease that has no clear dietary explanation.
Research has found that between 40% and 60% of people with IBS also meet criteria for an anxiety disorder, suggesting the two conditions are often part of the same underlying picture rather than separate diagnoses. If you've been told your gut symptoms are "just stress," the question worth asking is what, precisely, that stress is — and whether it might have a more specific name.
Chronic Muscular Tension
Anxiety activates the body's muscles in preparation for action that never comes. The shoulders rise, the neck stiffens, the lower back braces. Over time, this sustained muscular tension becomes chronic — a background tightness that you may have stopped noticing because it has been present for so long. Even without a formal diagnosis, the experience of being physically unable to relax — of muscles that cannot let go — is one of the body's clearest signals that the nervous system is in a state of chronic activation.
Heart Palpitations and Chest Tightness
Anxiety does not always produce dramatic, identifiable panic attacks. More often, it produces intermittent episodes of heart palpitations, a racing or irregular heartbeat, or a sense of tightness or pressure in the chest. These symptoms frequently send women to A&E departments and GP surgeries, where cardiac causes are ruled out and the patient is told — sometimes rather dismissively — that everything looks fine.
Everything may well be fine from a cardiac standpoint, but that is not the same as the woman being fine. Cardiovascular symptoms driven by anxiety are real and can be distressing, and they deserve investigation and support rather than simply reassurance.
Skin Reactivity
The skin and the nervous system are more intimately connected than most people realise — they develop from the same embryonic tissue, and stress hormones significantly affect skin function. Women with chronic anxiety frequently report worsening eczema, psoriasis, or hives during periods of heightened stress. Unexplained breakouts, increased skin sensitivity, and facial flushing can all be expressions of an anxious nervous system.
Persistent Fatigue
This is perhaps the most pervasive and most dismissed symptom. Chronic anxiety is exhausting. Maintaining a state of physiological alertness all day — even at low levels — requires enormous energy expenditure. The vigilance, the over-preparation, the constant mental monitoring of everything that could go wrong: these are cognitively and physically draining activities. Many women with high-functioning anxiety feel tired all the time but cannot account for it. They sleep enough, they tell their doctors. They are not particularly unwell. They are just tired.
What is happening is that their body is running a background programme of stress response 24 hours a day, and the energy cost of that programme is significant.
Disrupted Sleep — Even When You Fall Asleep
Many women with chronic anxiety do fall asleep reasonably well — and still wake up unrefreshed. This is because anxiety affects sleep architecture, reducing the proportion of deep, restorative slow-wave sleep even when total sleep duration is adequate. The result is waking tired, struggling with brain fog, feeling as though sleep did nothing — not because you didn't sleep, but because your sleep was not truly restful.
This is why addressing anxiety cannot focus only on the daytime. The night-time dimension of nervous system regulation is equally important, and often more urgently felt. Poor sleep amplifies daytime anxiety; heightened daytime anxiety worsens sleep quality. The two reinforce each other in a cycle that is difficult to break without addressing both ends.
Immune System Changes
Chronic cortisol elevation suppresses immune function over time. Women with persistent anxiety often notice they catch every cold that circulates, that they take longer than expected to recover from illness, or that they have a general sense of physical vulnerability that has no obvious explanation. A growing body of research also connects anxiety disorders with increased inflammatory markers, which may in part explain the link between chronic anxiety and a range of physical health conditions.
Why These Symptoms Go Unrecognised
There are structural reasons why the physical symptoms of anxiety are so frequently missed in women. Historically, medicine has been slower to take women's physical complaints seriously, and "it's just stress" remains one of the most common — and unhelpful — diagnoses women receive. There is also a cultural tendency for women to accommodate their symptoms rather than advocate for an explanation, particularly when those symptoms are diffuse, difficult to pin down, or seem excessive relative to what others around them appear to manage.
Within the NHS, time constraints in GP appointments make it difficult to connect a cluster of seemingly unrelated physical symptoms into a coherent picture. A woman might have separate appointments for headaches, gut problems, and fatigue, with no single clinician ever seeing all three together and asking what they might have in common.
Beginning to Listen
Attending to the body's anxiety signals is not about catastrophising or turning every symptom into a crisis. It is about giving the body the respect of your attention — noticing patterns, making connections, and taking seriously the information that persistent physical symptoms are trying to communicate.
A helpful starting point is a brief daily body scan: a few minutes, ideally morning and evening, of simply bringing attention to where you are holding tension. Not to fix it, but to notice it. Over time, this practice builds what clinicians call interoceptive awareness — the ability to accurately perceive your body's internal states — which is foundational to regulating stress.
Movement is one of the most well-evidenced interventions for the physical symptoms of anxiety. It doesn't need to be intense; research consistently shows that moderate, regular movement — even brisk walking — meaningfully reduces cortisol levels and improves sleep quality. The key variable is consistency rather than intensity.
Botanical support during the day can help regulate the nervous system's baseline reactivity. Ashwagandha has been shown across multiple clinical trials to reduce cortisol and perceived stress, targeting the HPA axis that drives many of anxiety's physical symptoms. Rhodiola rosea, approved by the European Medicines Agency for stress-related fatigue, is particularly useful for the exhaustion that accompanies chronic anxious arousal — it supports energy and resilience without stimulating the nervous system further. Passionflower works on the GABAergic system, helping to restore the nervous system's natural braking mechanism. Vitamin B6 is a direct co-factor in the synthesis of both GABA and serotonin; a 2022 double-blind RCT published in Human Psychopharmacology found that B6 supplementation produced statistically significant reductions in anxiety and confirmed via objective testing that GABA levels had increased in participants who received it.
Night-time recovery is equally non-negotiable. Because anxious bodies often can't wind down properly, sleep support specifically formulated for nervous system downregulation can make a significant difference. Valerian root, with a systematic review of 60 studies behind it, has clinical evidence for improving subjective sleep quality and reducing anxiety. Magnesium glycinate is one of the most bioavailable forms of magnesium — a mineral that plays a central role in GABA receptor function and muscle relaxation, and which is commonly deficient in chronically stressed women. Hops (Humulus lupulus) have long been used traditionally for anxiety and insomnia, and research has confirmed they work through GABA receptor modulation, shortening sleep onset and reducing nocturnal restlessness. Reishi mushroom, an adaptogenic fungus used in East Asian medicine for centuries, has demonstrated reductions in sleep onset latency and improvements in sleep duration in clinical research, alongside cortisol-regulating properties that benefit the anxious nervous system overnight.
Breathwork — specifically slow, extended exhalation — is one of the most direct tools available for shifting the nervous system out of sympathetic (fight-or-flight) dominance. Physiological sighs, box breathing, and 4-7-8 breathing all have evidence behind them for acute stress reduction. Practised before bed, they can meaningfully support the transition into restful sleep.
The Invitation
Your body is not failing you. It is doing exactly what a body does under sustained pressure — signalling, adapting, and eventually, when those signals go unheard, breaking down. The physical symptoms of anxiety are not weakness. They are information.
The invitation is to receive that information with curiosity rather than frustration. To ask not "why can't I just feel better?" but "what is my body trying to tell me, and what does it need?" That shift in orientation — from irritation at symptoms to curiosity about causes — is often the beginning of genuine change.
You have been listening to everyone else for a long time. Your body has been very patient.
This article is for informational purposes only and does not constitute medical advice. If you are concerned about physical symptoms, please speak to your GP. For mental health support, visit the NHS Every Mind Matters platform at nhs.uk/every-mind-matters
Sources and further reading:
- Fond, G. et al. (2014). Anxiety and depression comorbidities in irritable bowel syndrome. European Archives of Psychiatry and Clinical Neuroscience.
- Field, D.T. et al. (2022). High-dose Vitamin B6 supplementation reduces anxiety. Human Psychopharmacology. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9787829/
- Shinjyo, N. et al. (2020). Valerian Root in Treating Sleep Problems and Associated Disorders: A Systematic Review and Meta-Analysis. https://pubmed.ncbi.nlm.nih.gov/33086877/
- European Medicines Agency (2011). Herbal monograph on Rhodiola rosea L. EMA/HMPC/232091/2011.
- Zanoli, P. & Zavatti, M. (2008). Pharmacognostic and pharmacological profile of Humulus lupulus L. Journal of Ethnopharmacology.
- Mental Health UK — Menopause and Mental Health: mentalhealth-uk.org
- NHS — Anxiety, Fear and Panic: nhs.uk/mental-health
