You probably already know that stress makes your shoulders creep up toward your ears. Or that a rough week at work shows up as a stiff neck or a headache by Friday. But stress does more than just make you feel tense. It changes how your muscles, joints and nervous system function, and over time those changes can become a real problem.
Here is what actually happens in your body when stress takes hold, and what you can do about it.
What stress does to your muscles
When your brain perceives a threat, whether that is a genuine emergency or just a packed inbox and a looming deadline, it triggers two systems at once.
Your fight-or-flight response fires up. Your sympathetic nervous system releases adrenaline and noradrenaline, which increase your heart rate, sharpen your focus and tense your muscles. This is useful if you need to sprint away from danger. It is less useful when you are sitting in traffic.
Your stress hormone system kicks in. Your brain signals your adrenal glands to release cortisol, the hormone that keeps you alert and mobilised during stress. In short bursts this is fine. But when cortisol stays elevated for weeks or months, it starts to cause problems: it breaks down muscle tissue, impairs recovery, disrupts sleep and makes your pain pathways more sensitive.
The combination of sustained muscle tension and elevated cortisol creates a cycle. Your muscles tighten, they do not get a chance to recover, they fatigue, and then they hurt. That pain creates more stress, which tightens them further.
Why stress targets your neck, shoulders and back
You might notice that stress does not hit your body evenly. It tends to show up in the same places: the neck, the shoulders, the upper back, the jaw, and the lower back.
There is a reason for that. These are the areas that carry the most postural load. They are already working hard to hold you upright, especially if you spend your day at a desk. When stress adds a layer of sustained muscle contraction on top of that baseline load, these areas are the first to complain.
A 2025 study of office workers found that over 80% experienced musculoskeletal pain, with the neck (58.6%), lower back (52.5%) and shoulders (37.4%) most commonly affected. Job stress was significantly associated with pain across every body region.
This is why you can have a perfectly ergonomic workstation and still end up with neck pain or headaches. The physical setup matters, but so does what is happening in your head.
The longer it goes on, the worse it gets
Short-term stress tightens your muscles temporarily. Your body recovers and moves on. But chronic stress, the kind that runs for weeks, months or years, changes how your nervous system processes pain.
When stress stays elevated, your brain starts turning up the volume on pain signals. Normal sensations that would not usually bother you, a stiff joint, a tight muscle, start to feel more painful than they should. Researchers call this central sensitisation: your nervous system becomes more reactive and less able to filter out discomfort.
A 2024 review of 185 studies involving nearly 490,000 people found that psychological factors like stress, fear of movement and catastrophising were among the strongest predictors of acute pain becoming chronic. When five common risk factors were combined, the odds of developing chronic pain increased tenfold.
This does not mean the pain is “in your head.” It means your brain and nervous system are amplifying real signals from your body. The pain is real. But the volume control is broken.
Breaking the cycle
The good news is that this cycle responds to treatment. Addressing both the physical and the psychological sides of the problem gives the best results.
Move your body
Exercise is one of the most effective tools for managing stress and its physical effects. It reduces cortisol, releases endorphins, improves sleep and directly counteracts the stiffness that builds up from sustained muscle tension. You do not need to run a marathon. A daily walk, a swim, a gym session, or even a proper warm-up routine can make a noticeable difference.
Address your posture and work setup
If you are spending eight hours a day in a position that loads your neck and upper back, stress will hit those areas harder. Simple changes like adjusting your screen height, taking regular movement breaks and sitting with proper support can reduce the baseline load on your muscles, giving them more capacity to cope with stress.
Prioritise recovery
Sleep is when your body repairs muscle tissue, regulates cortisol and resets your nervous system. Chronic stress often disrupts sleep, which creates another vicious cycle. Prioritising sleep hygiene, whether that means a consistent bedtime, reducing screen time before bed, or creating a better sleep environment, has a direct effect on how your body handles stress.
Breathe
This sounds simple, but it works. Slow, controlled breathing activates your parasympathetic nervous system, the branch that calms your body down. Even a few minutes of deliberate breathing can reduce muscle tension, lower your heart rate and shift your nervous system out of fight-or-flight mode.
How chiropractic can help
When stress has been building for weeks or months, your muscles, joints and nervous system are all affected. Chiropractic care addresses the physical side of this directly.
Joint stiffness. Sustained muscle tension compresses and restricts the joints of your spine, particularly in the neck, upper back and lower back. Stress also commonly affects the jaw (TMJ), especially if you clench or grind your teeth. Chiropractic adjustments restore normal movement to these joints, reducing stiffness and pain. If your neck is stiff, your upper back is locked up, your lower back is aching or your jaw is tight, this is where treatment starts.
Muscle tension. Soft tissue therapy targets the tight, overworked muscles that stress creates, particularly through the upper traps, between the shoulder blades, across the chest and into the jaw. Releasing this tension gives your muscles a chance to reset.
Headaches. Stress-related headaches often originate from tension in the neck and upper back. Treating the joints and muscles in this area frequently reduces headache frequency and intensity.
Nervous system input. There is growing research into whether spinal manipulation influences the autonomic nervous system. A 2025 scoping review found that 80% of studies reported a reduction in blood pressure following cervical manipulation, and two-thirds showed improvements in the balance between sympathetic and parasympathetic nervous system activity. The evidence is still developing, but the direction is promising.
Practical advice. Beyond hands-on treatment, we help you identify what is contributing to the problem and give you strategies to manage it: exercises, postural adjustments, breathing techniques and movement habits that reduce the physical impact of stress on your body.
You do not have to just live with it
Stress is a normal part of life. But the muscle tension, stiffness and pain that come with it do not have to be. If you are carrying tension in your shoulders, waking up stiff, grinding your jaw or getting regular headaches, your body is telling you something.
At our Sandton practice, we treat stress-related musculoskeletal problems every day. We understand the connection between what is happening in your life and what is happening in your body, and we can help with both the symptoms and the underlying patterns.
Get in touch or book an appointment and let us help you loosen up.
References
- Neuroinflammation and chronic psychosocial stress as mechanisms of stress-induced pain. Brain, Behavior, & Immunity - Health. 2025; 44.
- Biopsychosocial factors associated with development of chronic musculoskeletal pain: umbrella review and meta-analysis (185 studies, 489,644 participants). PLoS ONE. 2024; 19(4).
- Musculoskeletal disorders among office workers: prevalence, ergonomic risk factors, and their interrelationships. Scientific Reports. 2025.
- Workplace psychosocial factors and their association with musculoskeletal disorders: systematic review of longitudinal studies. Workplace Health & Safety. 2023; 71(12).
- Effect of cervical manipulation on blood pressure and heart rate variability: a scoping review. Journal of Bodywork and Movement Therapies. 2025.