Why chronic stress is so damaging and what you can do about it
By Dr Louise, GP & Functional Medicine Practitioner
We all experience stress. In small, short bursts, stress is actually protective — it sharpens focus, mobilises energy, and helps us respond to challenges. The problem arises when stress is no longer occasional, but constant.
In modern life, many of us live in a state of low-grade, chronic stress — juggling work, family, finances, health concerns, and constant digital input. The body is not designed for this kind of relentless pressure. Over time, chronic stress becomes one of the most powerful drivers of hormonal imbalance, fatigue, inflammation, digestive issues, mood changes, and metabolic dysfunction.
In functional medicine, we call this pattern HPA axis dysfunction — a dysregulation of the hypothalamic-pituitary-adrenal axis, the system that controls your stress response.
What Is the HPA Axis and Why Does It Matter?
The HPA axis is the communication loop between your brain and your adrenal glands that regulates cortisol — your primary stress hormone.
When your brain perceives stress, it signals your adrenals to release cortisol. Cortisol helps mobilise glucose, increase blood pressure, sharpen alertness, and suppress non-essential functions like digestion, immunity, and reproduction. This is helpful in short-term danger. It is not helpful when switched on all day, every day.
With chronic stress:
- Cortisol rhythms become disrupted (too high, too low, or mistimed)
- The nervous system becomes stuck in “fight or flight”
- Hormone production (especially progesterone, thyroid hormones, and insulin sensitivity) is compromised
- Sleep, digestion, immune function, and mood are all affected
This is why people with HPA axis dysfunction often experience:
- Feeling “tired but wired”
- Energy crashes
- Anxiety or low mood
- Poor sleep
- Weight gain, especially around the middle
- PMS, perimenopause symptoms, or irregular cycles
- Reduced stress resilience
Importantly — this is not a personal failure or weakness. It is a physiological adaptation to prolonged stress.
Your body is doing its best to keep you safe. It just needs support to come back into balance.
How to Support Your Nervous System and HPA Axis
Healing from chronic stress requires both short-term nervous system regulation and long-term lifestyle and physiological support.
Short-Term Tools (Daily Nervous System Regulation)
These help shift your body out of fight-or-flight and into parasympathetic (rest-and-repair) mode:
- Breathwork
Slow breathing with a longer exhale (for example, inhale for 4, pause, then exhale for 6–8) activates the vagus nerve and lowers cortisol within minutes.
- Micro-rest moments
One to two minutes of pausing, stretching, stepping outside, or closing your eyes throughout the day prevents your system from staying in constant activation.
- Sensory calming
Humming, gentle neck/ear massage, warm showers, nature exposure, or calming music all signal safety to your nervous system.
- Evening wind-down routine
Consistent evening rituals help cortisol fall so that melatonin and progesterone can rise.
Long-Term Support (Restoring Balance at the Root)
These address the underlying drivers of HPA axis dysfunction:
- Blood sugar stability
Regular meals with protein, fibre, and healthy fats prevent cortisol spikes and protect hormonal balance.
- Sleep as medicine
Prioritising sleep timing and quality is one of the most powerful regulators of the HPA axis.
- Reducing physiological stressors
Inflammation, gut issues, nutrient deficiencies, over-exercise, under-eating, and toxin exposure all act as hidden stressors on the body.
- Creating true recovery time
Not just “time off,” but time where your nervous system genuinely feels safe, unpressured, and supported.
A Gentle Invitation
If you are constantly exhausted, struggling with hormonal symptoms, not sleeping well, or feeling like your body is no longer responding the way it used to — this is not something you have to push through or accept as normal.
Chronic stress changes your physiology. But with the right support, your body can heal.
Dr Louise, GP & Functional Medicine Practitioner @ Dr Indra Specialist Functional Medicine Practice https://drindra.co.uk/meet-the-team/
