Subtle Signals: How Your Body Whispers When Anxiety Is Present

Anxiety does not always announce itself with dramatic racing thoughts or an intense panic attack.

Sometimes, it is much quieter.

It may show up as a clenched jaw, restless legs, a stomach that never quite settles, disrupted sleep, or a feeling of being exhausted and “wired” at the same time.

These physical experiences can be easy to dismiss as “just stress” or the result of a busy life.

But our mental and physical experiences are closely connected. Anxiety can involve both psychological symptoms and physical sensations, including restlessness, fatigue, muscle tension, sleep difficulties, and other bodily symptoms (DeMartini et al., 2019).

At Authentic Living London, we help people become more aware of the ways anxiety may be showing up in their lives. Learning to notice these signals isn't about diagnosing yourself.

It is about becoming curious about what your mind and body may be communicating.

The Body's Quiet Language of Anxiety

Anxiety can affect multiple systems in the body. Some people experience very obvious physical symptoms, while others notice subtler changes that gradually become part of everyday life.

Here are some common physical experiences that can occur alongside anxiety.

1. Tight shoulders or a clenched jaw

You may notice that your shoulders are constantly tense or that you regularly clench your jaw without realizing it.

Muscle tension is a recognized physical symptom associated with generalized anxiety disorder and can occur alongside restlessness, fatigue, difficulty concentrating, irritability, and sleep disturbance (DeMartini et al., 2019).

Sometimes your body is tense before you consciously realize that you are stressed.

Try checking in with yourself throughout the day:

Are your shoulders relaxed?

Is your jaw unclenched?

Are you holding tension somewhere in your body?

That simple awareness can be a useful starting point.

2. Restless hands or legs

Maybe your foot is constantly bouncing under the table.

Perhaps you're tapping your fingers, changing positions repeatedly, or finding it difficult to sit still.

Restlessness is another physical symptom commonly associated with anxiety (DeMartini et al., 2019).

It doesn't automatically mean that you are anxious. People fidget for many reasons.

But if restlessness consistently appears alongside worry, tension, or difficulty switching off, it may be worth paying attention to the pattern.

3. Digestive changes

Anxiety and gastrointestinal symptoms can sometimes occur together.

You might experience butterflies in your stomach, nausea, changes in appetite, bloating, or other digestive discomfort.

The relationship between the brain and gastrointestinal system is complex and involves communication in both directions. Research has found associations between anxiety and gastrointestinal symptoms in several functional gastrointestinal conditions (Simpson et al., 2020; Zhang et al., 2024).

This doesn't mean that digestive symptoms are automatically caused by anxiety.

Persistent or unexplained gastrointestinal symptoms deserve appropriate medical attention.

But if you notice that your stomach tends to react during periods of worry or emotional stress, it may be useful to consider both your physical and emotional wellbeing.

4. Shallow breathing or frequent sighing

Have you ever suddenly realized that you are taking very shallow breaths?

Or perhaps you find yourself sighing repeatedly throughout the day.

Changes in breathing can occur alongside anxiety, and breathing-focused interventions have been studied as a potential way of reducing anxiety symptoms.

A 2021 meta-analysis of 40 randomized controlled trials found that respiratory-focused interventions were associated with improvements in anxiety symptoms, although the researchers noted considerable variation between interventions and study designs (Fincham et al., 2023).

A more recent systematic review of breathing exercises also found evidence of reductions in anxiety and stress across several types of interventions, while emphasizing the need for larger, high-quality randomized trials (Holm et al., 2024).

The takeaway isn't that you need to “fix” your breathing.

Rather, noticing your breathing can be one simple way of becoming more aware of what is happening in your body.

5. Feeling exhausted but unable to switch off

One of the more frustrating experiences of anxiety can be feeling completely exhausted while still being unable to relax.

You may be tired all day but find your mind becomes particularly active when you finally get into bed.

Or you may sleep for what seems like enough hours and still wake feeling unrested.

Sleep disturbance is strongly associated with anxiety-related disorders. A meta-analysis found substantial differences in subjective sleep disturbance among people with anxiety-related disorders compared with healthy controls, as well as reductions in sleep duration and continuity (Cox & Olatunji, 2020).

Anxiety and sleep can also influence one another.

Worry can interfere with sleep, while poor sleep may make it harder to regulate emotions and manage stress.

That can create a frustrating cycle.

6. Tension headaches or jaw pain

Muscle tension can sometimes contribute to physical discomfort, including headaches or jaw soreness.

You might notice that your jaw is particularly sore at the end of a stressful day.

Or perhaps you regularly wake with tension in your face, neck, or shoulders.

Again, these symptoms have many possible causes.

The important thing is to notice patterns rather than assume that every physical sensation is anxiety.

If pain is persistent, severe, new, or unexplained, it is important to speak with an appropriate healthcare professional.

7. Sleep disruptions

Anxiety doesn't always prevent you from falling asleep.

Sometimes the disruption happens later.

You may wake during the night and immediately start thinking about tomorrow.

You may wake unusually early with a mind full of worries.

Or you may find that your sleep is lighter and less restorative during stressful periods.

Research consistently identifies sleep disturbance as an important feature associated with anxiety-related disorders (Cox & Olatunji, 2020).

If poor sleep is becoming persistent, addressing both sleep and anxiety may be worthwhile.

8. Changes in temperature, sweating, or skin sensations

Anxiety can also involve changes in autonomic arousal.

Some people notice clammy hands, sweating, flushing, feeling unusually warm, or experiencing other bodily sensations during periods of anxiety.

These sensations can be especially noticeable when the body is responding to perceived threat.

But physical symptoms such as sweating, temperature changes, skin changes, palpitations, or unexplained fatigue can have many causes.

They shouldn't automatically be interpreted as anxiety.

Your body is giving you information.

The goal is to listen without jumping to conclusions.

What's Happening in the Brain and Body?

Understanding the biology of anxiety can sometimes make these experiences feel less mysterious.

When we perceive a threat, the brain and body coordinate a complex response that prepares us to respond.

This involves multiple systems, including brain networks involved in threat detection, the autonomic nervous system, and the hypothalamic-pituitary-adrenal (HPA) axis.

The result can include changes in heart rate, breathing, muscle tension, alertness, and other bodily functions.

Importantly, anxiety isn't simply an “amygdala problem.”

The amygdala is involved in processing emotionally significant and potentially threatening information, but anxiety involves a much broader network of brain and body systems.

Similarly, the body's stress response is not simply an on/off switch.

It is a dynamic system involving multiple interacting processes.

This complexity is one reason why anxiety can look so different from person to person.

Why Anxiety Can Feel Physical

Your brain doesn't experience emotions separately from your body.

Anxiety involves both psychological and physiological processes.

This helps explain why you can feel anxious even when you aren't consciously thinking:

“I'm anxious.”

Your first clue might instead be:

“Why are my shoulders up around my ears?”

Or:

“Why can't I sit still?”

Or:

“Why has my stomach been upset all week?”

Or:

“Why am I exhausted but unable to relax?”

Recognizing these patterns can help you become more aware of your own experiences.

It can also help you notice when stress is beginning to build.

But These Symptoms Don't Always Mean Anxiety

This is an important distinction.

None of the symptoms on this list is specific to anxiety.

Muscle tension can result from physical activity, posture, pain conditions, or other factors.

Digestive symptoms can have numerous medical causes.

Fatigue can be related to sleep, medications, physical health, stress, or many other factors.

Sleep problems can occur for countless reasons.

And changes in temperature or sweating may have medical, hormonal, environmental, or emotional explanations.

So rather than asking:

“Do I have anxiety because my jaw hurts?”

A better question might be:

“What patterns am I noticing in my body, thoughts, emotions, and circumstances?”

If symptoms are new, persistent, severe, or concerning, speak with your doctor or another qualified healthcare professional.

Why Paying Attention Can Help

It's easy to spend months pushing through. You keep working, showing up for everyone else. You tell yourself you'll rest when things calm down, but sometimes “when things calm down” never arrives. Becoming aware of subtle signs can give you an opportunity to pause earlier.

You might notice:

“I've been sleeping badly for three weeks.”

“My jaw is constantly tense.”

“I've been feeling restless every evening.”

“I can't remember the last time I felt genuinely relaxed.”

Those observations don't mean something is necessarily wrong.

They can simply be invitations to become curious about what you need.

Simple Ways to Support Yourself

You don't have to overhaul your entire life.

Small practices can help you reconnect with what is happening in your body.

Notice your breathing

Take a moment to notice your breathing without trying to force it to change.

If you find yourself breathing rapidly or holding your breath, gentle, controlled breathing may be worth exploring.

Research suggests that breathing-focused interventions can reduce anxiety symptoms for some people (Fincham et al., 2023; Holm et al., 2024).

Check for tension

Several times a day, notice your:

• Jaw

• Shoulders

• Hands

• Stomach

• Neck

• Legs

Ask yourself:

“Am I holding tension here?”

You don't have to force your body to relax.

Awareness comes first.

Create space for mindfulness

Mindfulness practices encourage you to pay attention to present-moment experiences with greater awareness and less judgment.

Research suggests that mindfulness-based interventions can reduce anxiety symptoms, although effects vary according to the specific intervention, population, and comparison treatment (Haller et al., 2021; Li et al., 2021).

Mindfulness isn't about emptying your mind.

It is about noticing what is happening without immediately trying to push it away.

Pay attention to sleep

If anxiety and poor sleep are feeding each other, addressing both may be important.

Look at your sleep patterns rather than focusing only on the number of hours you spend in bed.

Are you waking repeatedly?

Is your mind racing when you wake?

Do you feel rested?

Patterns can provide useful information.

Consider professional support

If anxiety is affecting your relationships, work, sleep, physical wellbeing, or enjoyment of life, you don't have to wait until it becomes overwhelming before seeking help.

Therapy can provide a space to understand what is happening, explore underlying patterns, and develop strategies for managing anxiety.

Reconnecting With Yourself at Authentic Living London

At Authentic Living London, we believe that meaningful therapy considers the whole person.

Your thoughts, emotions, relationships and your experiences, plus the ways all of these can interact with your physical experience.

In a warm, safe, and non-judgmental space, our therapists can help you:

• Identify patterns in your anxiety and stress responses

• Explore possible triggers and underlying concerns

• Develop practical strategies for managing anxiety

• Build greater emotional awareness and self-compassion

• Learn ways to become more present and connected with yourself

• Explore whether deeper therapeutic support could be helpful

You don't have to be in crisis to seek therapy.

Sometimes therapy begins with something much quieter:

“I don't feel like myself anymore, and I want to understand why.”

Take the First Step Toward Greater Calm

If several of these experiences feel familiar, consider it an invitation to become curious rather than frightened.

Your body isn't your enemy.

And every physical sensation doesn't need to be explained by anxiety.

But learning to notice patterns in your body, thoughts, emotions, and circumstances can be an important part of understanding yourself.

At Authentic Living London, we offer in-person and online counselling and psychotherapy tailored to your individual needs.

If you're ready to explore what may be underneath the surface, we're here to help.

Contact Authentic Living London to book a consultation.

You don't have to navigate anxiety alone.

Sometimes the first step toward feeling calmer is simply learning to listen to yourself with a little more kindness.

This article is for educational purposes only and is not intended to diagnose or treat anxiety or any other health condition. Physical symptoms can have many causes. If you are experiencing new, persistent, severe, or concerning symptoms, please consult a qualified healthcare professional.

References

Cox, R. C., & Olatunji, B. O. (2020). Sleep in the anxiety-related disorders: A meta-analysis of subjective and objective research. Sleep Medicine Reviews, 50, 101255. https://doi.org/10.1016/j.smrv.2019.101255

DeMartini, J., Patel, G., & Fancher, T. L. (2019). Generalized anxiety disorder. Annals of Internal Medicine, 170(7), ITC49–ITC64. https://doi.org/10.7326/AITC201904020

Fincham, G. W., Strauss, C., Montero-Marin, J., & Cavanagh, K. (2023). Effect of breathwork on stress and mental health: A meta-analysis of randomised-controlled trials. Scientific Reports, 13, 432. https://doi.org/10.1038/s41598-022-27247-y

Haller, H., Breilmann, P., Schröter, M., Dobos, G., & Cramer, H. (2021). A systematic review and meta-analysis of acceptance- and mindfulness-based interventions for DSM-5 anxiety disorders. Scientific Reports, 11, 20385. https://doi.org/10.1038/s41598-021-99882-w

Holm, S. E., et al. (2024). A systematic review of breathing exercise interventions: An integrative complementary approach for anxiety and stress in adult populations. Journal of Holistic Nursing. https://doi.org/10.1177/08980101241273860

Li, J., Cai, Z., Li, X., Du, R., Shi, Z., Hua, Q., Zhang, M., Zhu, C., Zhang, L., & Zhan, X. (2021). Mindfulness-based therapy versus cognitive behavioral therapy for people with anxiety symptoms: A systematic review and meta-analysis of randomized controlled trials. Annals of Palliative Medicine, 10(7), 7596–7612. https://doi.org/10.21037/apm-21-1212

Simpson, C. A., Mu, A., Haslam, N., Schwartz, O. S., & Simmons, J. G. (2020). Feeling down? A systematic review of the gut microbiota in anxiety/depression and irritable bowel syndrome. Journal of Affective Disorders, 266, 429–446. https://doi.org/10.1016/j.jad.2020.01.124

Zhang, Y., et al. (2024). Comparing the prevalence and association between anxiety, depression and gastrointestinal symptoms in gastroparesis versus functional dyspepsia: A systematic review and meta-analysis. Neurogastroenterology & Motility. https://doi.org/10.1111/nmo.14712