The Hidden Clues Behind Sleepless Nights
- May 24
- 6 min read
I'm an international holistic health practitioner, specialising in supporting individuals with ADHD, autism, allergies, sleep issues, and gut problems using natural medicine. I help people uncover and treat root causes so they can reclaim their health and thrive.
In clinical practice, I often hear, "Why can't I fall asleep?" and "Why can't I stay asleep?" If you struggle with this, you are not alone. Sleep problems are common, but most discussions focus only on stress, poor habits, or the need to 'switch off.'
However, sleep is much more complicated than these explanations suggest. Sleep is not simply shutting down for the night. It is one of the body's most active, restorative processes. During sleep, the brain detoxifies, inflammation is regulated, hormones recalibrate, neurotransmitters rebalance, and the nervous system repairs itself. When sleep is disrupted, these systems do not pause. Even one night of poor sleep can lower dopamine levels by about twenty per cent. Over time, these systems can become imbalanced.
The effects of poor sleep can begin subtly, with increased anxiety or overwhelm, reduced stress tolerance, brain fog and poor concentration, emotional reactivity, feeling “tired but wired,” and fatigue that does not improve with rest. What many people do not realise is that poor sleep itself can drive these symptoms biologically.
The neurotransmitter connection
One of the most overlooked aspects of insomnia is the role neurotransmitters play in regulating the sleep-wake cycle and calming the nervous system. The calming neurotransmitter GABA plays a major role in helping the body transition from activity into rest. When GABA levels are low, or when the nervous system is overstimulated, the brain can remain hyper alert long after the body feels physically exhausted. This is often why you may feel drained during the day, yet unable to switch your mind off at night, preventing you from dropping off to sleep. Low GABA is commonly associated with racing and intrusive thoughts, anxiety and overwhelm, stress eating, difficulty relaxing deeply, waking easily due to noise, and feeling “tired but wired.”
At the same time, elevated cortisol and adrenaline keep the body in a state of alertness, making it difficult for melatonin, the hormone responsible for sleep timing, to work effectively. Once this cycle starts, it often repeats, low GABA increases anxiety, which elevates cortisol, which suppresses melatonin, and poor sleep worsens stress and nervous system dysregulation. Round and round it goes. This is why insomnia is often not simply a lack of sleep signals. More commonly, it is the presence of ongoing activation within the nervous system that keeps the brain in a state of readiness.
Sleep starts long before bedtime
One of the biggest misconceptions about sleep is that it starts at night. In reality, sleep begins from the moment you wake up. Your circadian rhythm, which is your body’s internal clock, relies heavily on light exposure to regulate hormones and sleep timing appropriately. Morning sunlight helps regulate cortisol during the day and melatonin later that evening. Without adequate natural light exposure, the body’s timing systems can slowly drift out of sync.
This is compounded by modern life, which disrupts the circadian rhythm. Artificial lighting, screens, EMF radiation, late nights, irregular schedules, shift work, travel, and constant stimulation continue sending wakefulness signals to the brain long after the body should be preparing for rest. Additionally, bright light exposure at night suppresses melatonin production and tells the brain it is still daytime, making it harder for the nervous system to transition into restorative sleep. Along with blue light, some experts argue that EMFs also suppress melatonin production and disrupt circadian rhythms.
One of the simplest yet most powerful things you can do for sleep is to get outside within the first hour of waking, expose your eyes to natural morning light for 10–15 minutes, reduce bright light and screen exposure at night, and aim for more consistent sleep and wake times, even at weekends. Over time, these small shifts strongly influence circadian rhythm regulation.
Why you feel “tired but wired”
One of the most common patterns I see clinically is what I describe as being “tired but wired.” Physically, you feel exhausted, yet mentally, your brain refuses to settle. Thoughts replay, conversations loop, and your nervous system feels hyper alert despite fatigue. Stress today is far more than emotional stress alone.
Inflammatory foods, unstable blood sugar, excessive screen exposure, sensory overload, gut dysfunction, mould exposure, toxins, infections, trauma, allergies, and chronic overstimulation can all keep the nervous system activated. For some people, the body simply does not feel safe enough to fully power down. This is particularly relevant in ADHD and autism, where nervous system sensitivity, circadian rhythm disruption, inflammation, allergies, sensory processing differences, and neurotransmitter imbalances commonly contribute to sleep difficulties.
Why do you wake between 2 am and 4 am
Another extremely common pattern is waking between 2 am and 4 am, which often has a significant metabolic and hormonal component.
Blood sugar instability is frequently involved. If blood sugar drops too low overnight, the body sees this as a stress response and releases cortisol and adrenaline to raise glucose levels again. Unfortunately, those same stress hormones also wake you up.
Cortisol, which helps us wake, follows a natural cycle. When this rhythm becomes dysregulated, it may rise too early, creating a state of wakefulness while the body is still in a period intended for rest. This is not simply waking, but a transition into alertness that arrives before the night has fully completed.
Over time, disrupted sleep can lead to other symptoms. Appetite may shift, often leaning toward sugar and quick energy, not out of habit, but as a response to a body attempting to compensate for fatigue. Energy becomes less stable, and the system begins to cycle between stimulation and depletion. Night sweats can sometimes also be linked to overnight blood sugar crashes or adrenal exhaustion.
Hormonal fluctuations, particularly during perimenopause and menopause, can worsen this pattern because oestrogen and progesterone influence cortisol regulation, temperature control, neurotransmitter balance, and sleep quality.
Alcohol is another major contributor to interrupted sleep. While it may initially make you sleepy, it often disrupts deeper restorative sleep later in the night and increases early morning waking.
Sleeping eight hours but still exhausted?
If you sleep seven or eight hours but still wake up exhausted, focus on improving sleep quality rather than just increasing sleep duration.
Deep sleep and REM sleep are where the brain repairs itself, consolidates memory, regulates neurotransmitters, clears inflammatory waste products, and restores the nervous system. If these stages are disrupted, you may technically be asleep without truly restoring.
Adding to this, inflammation plays a major role. Increasingly, research links inflammation to anxiety, depression, ADHD, autism, cognitive dysfunction, and neurodegenerative conditions.
Inflammation can be driven by poor gut function, mould exposure, allergens, toxins, infections, microbiome imbalances, and inflammatory diets. These factors can greatly disrupt sleep, nervous system regulation, and neurotransmitter balance, so targeting sources of inflammation is essential for improving sleep.
Breathing issues during sleep are another commonly overlooked factor. Sleep apnoea, mouth breathing, snoring, nasal congestion, sinus inflammation, and allergies can all impair oxygen delivery during sleep and reduce sleep quality.
Nutrient deficiencies and sleep
Nutritional deficiencies are also far more common than many people realise and can significantly affect neurotransmitter production and nervous system regulation.
Magnesium deficiency may profoundly affect GABA activity, stress resilience, muscle relaxation, and sleep quality. Iron deficiency is another major contributor, particularly in women and children, with low ferritin levels strongly associated with fatigue, restless sleep, restless legs, poor concentration, and insomnia.
Melatonin supplements can sometimes be useful in the short term to help reset the circadian rhythm, especially in low doses or as a homeopathic balancing course to optimise your natural levels.
Root causes, such as chronic stress, excessive blue light exposure, unstable blood sugar, inflammation, or an overstimulated nervous system, need to be addressed. While supplements can support sleep, especially when individualised, they should be used alongside daily supportive activities.
What activities actually help sleep
Getting out into the early morning light, maintaining regular sleep and wake times, limiting blue light exposure at night, stabilising blood sugar with adequate protein and healthy fats, reducing alcohol intake, creating a cool, dark bedroom, and supporting nervous system regulation can all help.
Breathwork, meditation, Yoga Nidra, Epsom salt baths, grounding practices, and sleep-enhancing routines, like dimming the lights at night, prepare the body for rest. Sometimes even simple techniques, such as slowly counting backwards from 100 during night waking, can help interrupt looping thoughts and gently guide the nervous system back toward rest.
Sleep is a biological requirement
Lasting improvements in sleep often come not from focusing on sleep alone, but from understanding and correcting the underlying factors keeping the body in a state of alertness. As those systems begin to rebalance, deeper and more restorative sleep can often return naturally.
If you are struggling with insomnia, restless sleep, or waking exhausted, my Restorative Sleep Reset, a 90-Day Holistic Sleep Solution Program, is designed to help uncover and address the underlying factors affecting sleep quality. This personalised holistic program supports the systems involved in restorative sleep so you can feel calmer, clearer, and more energised. Learn more here.
Read more from Tina Horrell
Tina Horrell, Natural Health Care Practitioner
Tina Horrell is an integrative homeopath and naturopath with over 25 years of international experience. Tina supports individuals and families with a range of health concerns, specialising in autism, ADHD, allergies, gut issues, and sleep problems. She also offers targeted detox programs for heavy metals and environmental toxins. Her work blends homoeopathy, nutrition, herbal medicine, and detoxification to restore clients' balance and vitality, mentally, emotionally, and physically. Tina consults with clients worldwide via online video sessions and is a regular health writer for Brainz Magazine.
