How Stress Affects Muscle Tension and Pain: What the Science Says

Have you ever noticed your shoulders becoming tight during a stressful day? Perhaps your neck starts aching after a difficult week, your jaw feels tense, or an old back problem suddenly seems worse when life becomes more demanding. 

This isn’t necessarily your imagination. 

Stress can influence muscle activity, the nervous system, sleep, movement, and the way the brain processes pain. While stress is not the sole cause of most musculoskeletal pain, research suggests that psychological stress can contribute to the development, persistence, and intensity of pain in some people. 

Understanding the relationship between stress, muscle tension, and pain can help you take a more effective approach to managing symptoms.

What Happens to Your Body When You’re Stressed? 

When you experience stress, your body activates systems designed to help you respond to a perceived threat. These include the sympathetic nervous system and the hypothalamic-pituitary-adrenal (HPA) axis. 

This is often described as the body’s “fight-or-flight” response. 

You may notice:

• Increased heart rate

• Faster breathing

• Increased alertness

• Changes in muscle activity

• Increased sweating

• A heightened state of readiness

These responses can be useful in the short term. The problem can arise when stress becomes frequent, prolonged, or difficult to recover from.

Research increasingly suggests that dysregulation of stress-response systems can be associated with altered pain sensitivity, although the relationship is complex and varies between individuals. A 2026 systematic review and meta-analysis found associations between physiological stress markers — including cortisol, heart rate, and heart-rate variability — and pain sensitivity in people with chronic primary pain. The authors also emphasised that the evidence remains limited by considerable variation between studies.

1. Stress Can Increase Muscle Tension

One of the most familiar physical responses to stress is muscle tightening.

When you’re concentrating, worried, anxious, or under pressure, you may unconsciously tense muscles around your:

• Neck

• Shoulders

• Upper back

• Jaw

• Lower back

You might not even realise you’re doing it.

For example, someone working at a computer during a stressful deadline may spend hours with their shoulders slightly elevated and their jaw clenched. Over time, this can contribute to feelings of stiffness, fatigue, or discomfort.

However, it’s important not to oversimplify this relationship. Muscle tension isn’t the only mechanism responsible for stress-related pain, and pain cannot always be explained by muscle tightness alone.

2. Stress Can Change How Your Brain Processes Pain

Pain isn’t simply a signal travelling from an injured body part to the brain.

The nervous system continuously evaluates incoming information and determines how much of a threat it represents.

Stress can influence this pain-processing system.

Research on stress-induced hyperalgesia suggests that repeated or chronic stress can increase pain responses in certain circumstances. Reviews of experimental and clinical research have identified changes in neural systems involved in pain processing as possible mechanisms.

This helps explain why the same physical sensation can sometimes feel more painful when you’re stressed than when you’re relaxed.

3. Stress May Make Existing Pain Feel Worse

Stress doesn’t necessarily create pain from nothing.

Instead, it may amplify symptoms that are already present.

For example, you might have mild neck discomfort that normally doesn’t interfere with your day. During a particularly stressful period, however, the same discomfort may become much more noticeable.

A systematic review examining perceived stress and life stressors found evidence linking stress with the development of chronic musculoskeletal pain, although the researchers described the overall evidence as heterogeneous and limited in some conditions.

This is an important distinction:

Stress-related pain is real pain.

It doesn’t mean that the pain is “all in your head.”

4. Stress and Neck Pain

The neck and shoulders are particularly common areas for stress-related tension.

A systematic review and meta-analysis involving 28 studies and more than 39,000 participants found an association between psychological stress and chronic nonspecific neck-arm pain. However, the researchers noted substantial variation between studies and judged the quality of evidence to be limited.

Stress may interact with other factors such as:

• Prolonged sitting

• Computer use

• Poor sleep

• Reduced physical activity

• Muscle fatigue

• Anxiety about pain

This means that simply stretching your neck may not address the whole problem.

5. Stress Can Affect Your Sleep — and Sleep Can Affect Pain

Stress and sleep are closely connected.

During stressful periods, you may find it harder to:

• Fall asleep

• Stay asleep

• Relax before bed

• Feel rested in the morning

Poor sleep can then affect how you experience pain and how well you cope with physical discomfort.

This can create a frustrating cycle:

Stress → poor sleep → increased sensitivity to pain → reduced activity → more stress

Breaking this cycle may require addressing more than the painful area itself.

6. Stress Can Change How You Move

When you’re stressed or worried about pain, you may unconsciously alter your movements.

For example, you might:

• Hold your shoulders rigidly

• Avoid certain movements

• Walk differently

• Reduce physical activity

• Guard a painful area

Over time, reduced movement can contribute to stiffness, weakness, and reduced physical capacity.

This is one reason physiotherapy often focuses not only on the painful area but also on movement, strength, activity levels, and confidence.

7. Stress Doesn’t Always Increase Pain

It’s important to recognise that the relationship between stress and pain isn’t straightforward.

Interestingly, research shows that stress can sometimes reduce pain temporarily, a phenomenon known as stress-induced analgesia.

The effect depends on factors including the type, intensity, and duration of the stressor and the individual’s physiological and psychological response.

So it’s inaccurate to say that all stress causes more pain.

Instead, stress can modulate the nervous system’s response to pain in different ways.

8. Chronic Stress May Contribute to Persistent Pain

When stress becomes prolonged, the body may have difficulty returning to its normal resting state.

Researchers have investigated how repeated stress exposure may affect the HPA axis, autonomic nervous system, and neural pathways involved in pain.

A 2019 systematic review found evidence that perceived stress and life stressors may play a role in the development of chronic musculoskeletal pain, although the researchers highlighted significant differences in how stress was measured across studies.

More recent research continues to investigate these mechanisms. A 2026 systematic review found evidence of associations between altered stress-system activity and increased pain sensitivity in chronic primary pain, but concluded that the certainty of evidence was generally low to moderate.

This is why stress should be viewed as one potential contributor to persistent pain — not necessarily the single cause.

How Can You Reduce Stress-Related Muscle Tension and Pain?

The solution isn’t simply “relax.”

A more effective approach is usually to address several contributing factors at the same time.

1. Keep Moving

Regular physical activity can help maintain strength, mobility, and physical confidence.

You don’t necessarily need an intense workout.

Try:

• Walking

• Gentle mobility exercises

• Strength training

• Cycling

• Swimming

• Yoga or other suitable activities

If movement consistently aggravates your symptoms, a physiotherapist can help you determine an appropriate level and progression.

2. Take Regular Movement Breaks

If you work at a desk, avoid staying in one position for prolonged periods.

Try:

• Standing up regularly

• Walking around during breaks

• Changing your sitting position

• Performing gentle shoulder movements

• Taking short walking breaks

There is no single “perfect posture” that you need to maintain all day. Changing positions regularly is often more useful than trying to hold yourself rigidly in one position.

3. Practise Relaxation or Breathing Techniques

Relaxation techniques may help reduce the physiological arousal associated with stress.

Options include:

• Slow breathing

• Mindfulness

• Progressive muscle relaxation

• Meditation

• Gentle stretching

Research on non-pharmacological stress-reduction interventions suggests these approaches may help with chronic pain management, although evidence for specific biological mechanisms remains limited and inconsistent.

4. Prioritise Sleep

Improving sleep can be an important part of managing the stress-pain cycle.

Consider:

• Maintaining a consistent sleep schedule

• Reducing stimulating activities before bed

• Creating a comfortable sleeping environment

• Addressing persistent sleep difficulties with an appropriate healthcare professional

5. Address the Physical Contributors

If you regularly experience muscle tension, don’t assume stress is the only explanation.

A physiotherapist can assess:

• Muscle strength

• Joint mobility

• Movement patterns

• Workstation demands

• Exercise habits

• Physical activity levels

• Previous injuries

This can help identify physical factors that may be contributing to your symptoms.

6. Don’t Avoid Movement Because of Fear

If you’re worried that movement will damage your body, you may gradually become less active.

Instead, appropriately graded movement can help rebuild confidence and physical capacity.

Your physiotherapist can help you identify which movements are appropriate and gradually increase your tolerance.

When Should You See a Physiotherapist? 

Consider seeing a physiotherapist if muscle tension or pain:

• Keeps returning

• Interferes with work

• Affects your sleep

• Limits exercise

• Makes everyday activities difficult

• Hasn’t improved with self-management

• Is accompanied by weakness or significant movement restriction

A physiotherapist can help determine whether your symptoms are primarily related to movement and musculoskeletal factors or whether further medical assessment is appropriate.

When Should You Speak to a Doctor?

Not every symptom should be attributed to stress.

Seek medical advice if you have new, severe, unexplained, or rapidly worsening pain, particularly if it occurs with symptoms such as significant weakness, numbness, fever, unexplained weight loss, chest pain, breathing difficulties, or other concerning changes.

Stress can influence pain, but it should not be used to dismiss symptoms that require investigation.

The Bottom Line

Stress and pain have a two-way relationship.

Stress can influence muscle activity, nervous-system function, sleep, movement, and pain sensitivity. At the same time, persistent pain can itself become a significant source of stress.

Research supports an association between stress and musculoskeletal pain, while newer research is continuing to explore how stress-response systems influence pain sensitivity. However, the relationship is complex, and stress should not automatically be considered the cause of someone’s pain.

The most effective approach is often a combination of:

• Regular movement

• Strength and mobility exercises

• Good sleep

• Stress-management strategies

• Education about pain

• Appropriate physiotherapy when needed

You don’t have to eliminate every stressful event from your life to feel better. Instead, the goal is to improve your body’s ability to move, recover, and respond to stress.

References

Ferdousi, M., Finn, D. P., & colleagues. (2018). Stress-induced modulation of pain: Role of the endogenous opioid system. Progress in Brain Research, 239, 121–177. https://doi.org/10.1016/bs.pbr.2018.07.002.

Jennings, E. M., Okine, B. N., Roche, M., & Finn, D. P. (2014). Stress-induced hyperalgesia. Progress in Neurobiology, 121, 1–18. https://doi.org/10.1016/j.pneurobio.2014.06.003

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Olango, W. M., & Finn, D. P. (2014). Neurobiology of stress-induced hyperalgesia. Current Topics in Behavioral Neurosciences, 20, 251–280. https://doi.org/10.1007/7854_2014_302.

Szczepanik, M., et al. (2019). The role of perceived stress and life stressors in the development of chronic musculoskeletal pain disorders: A systematic review. The Journal of Pain, 20(10), 1127–1139. https://doi.org/10.1016/j.jpain.2019.02.008

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Lee, H., Hübscher, M., Moseley, G. L., Kamper, S. J., Traeger, A. C., Mansell, G., & McAuley, J. H. (2016). Is there a relationship between psychological stress or anxiety and chronic nonspecific neck-arm pain in adults? A systematic review and meta-analysis. Journal of Psychosomatic Research, 90, 70–81. https://doi.org/10.1016/j.jpsychores.2016.09.006

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Lerman, S. F., Rudich, Z., Bruehl, S., & others. (2020). A systematic review of biological mechanisms and chronic pain outcomes during stress reduction interventions. Pain Medicine.

Vyverman, J., De Baere, R., Timmers, I., Coppieters, I., Van Oosterwijck, J., & Moerkerke, M. (2026). The stress–pain connection in chronic primary pain: A systematic review and meta-analysis of physiological stress markers in relation to experimental pain responses. Neuroscience & Biobehavioral Reviews, 184, 106604. https://doi.org/10.1016/j.neubiorev.2026.106604

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Clinical note: The research supports an association between stress and pain, but it does not mean that pain is psychological or that stress is always the underlying cause. A thorough assessment should consider physical, neurological, psychological, and lifestyle factors together.