What is Insomnia?
Insomnia is a sleep disorder characterised by ongoing difficulty with sleep despite having the opportunity to sleep.
Common features include:
- Difficulty falling asleep
- Waking frequently during the night
- Waking very early and being unable to fall back asleep
- Feeling unrefreshed after sleep
- Daytime fatigue or low energy
- Difficulty concentrating or memory issues
- Irritability or low mood
Why Does Insomnia Develop?
Below are some of the most commonly discussed mechanisms involved in insomnia.
Nervous System Hyperarousal
The autonomic nervous system regulates our “fight or flight” response and our “rest and digest” state. Ideally, the body should shift toward a relaxed parasympathetic state in the evening to prepare for sleep.
However, when the nervous system remains in a heightened state of alertness, the body may struggle to wind down. This can lead to:
- racing thoughts
- difficulty relaxing at night
- light or fragmented sleep
- waking easily from small disturbances
Circadian Rhythm Disruption
This rhythm is influenced by light exposure, hormones, and daily routines. Disruptions to the circadian rhythm can interfere with the body’s ability to fall asleep and wake at consistent times.
Common causes of circadian disruption include:
- irregular sleep schedules
- shift work
- late-night screen exposure
- travel across time zones
- insufficient daytime sunlight exposure
Hormonal Imbalances
Two of the most important hormones are melatonin and cortisol.
Melatonin is released by the brain in the evening and signals to the body that it is time to sleep. Cortisol, often referred to as the stress hormone, helps regulate alertness and energy.
If cortisol levels remain elevated in the evening due to stress or nervous system dysregulation, melatonin production may be suppressed. This can make it difficult to fall asleep or maintain deep sleep.
Hormonal changes related to ageing, menopause, or chronic stress can also influence sleep quality.
Gut Health and Sleep
The gut microbiome influences neurotransmitters involved in sleep regulation, including serotonin and melatonin. In fact, a large proportion of serotonin — which helps regulate mood and sleep — is produced in the gut.
Digestive issues such as bloating, reflux, or food sensitivities can also interfere with sleep by causing discomfort or activating the nervous system.
Because of the close relationship between the gut and brain, imbalances in the microbiome may contribute to both sleep disturbances and mood changes.
Mental and Emotional Stress
When the brain perceives stress or threat, it activates the body’s stress response systems. This increases alertness and prepares the body for action — the opposite of what is required for restful sleep.
Over time, this can create a cycle where poor sleep increases stress levels, and heightened stress further disrupts sleep.
In some cases, individuals may develop sleep anxiety, where worrying about not sleeping becomes a factor that keeps the mind active at night.
Common Symptoms of Insomnia
Insomnia can present with a variety of symptoms affecting both night-time sleep and daytime functioning.
Common symptoms include:
- Difficulty falling asleep
- Frequent night awakenings
- Waking too early in the morning
- Light or restless sleep
- Daytime fatigue
- Poor concentration
- Memory difficulties
- Irritability or low mood
- Reduced physical and mental performance
Chronic insomnia can also contribute to other health challenges such as headaches, weakened immune function, mood disorders, and increased stress sensitivity.
Understanding Insomnia as a Whole-Body Issue
Insomnia is rarely caused by a single factor. Instead, it often involves a combination of influences including nervous system dysregulation, stress, hormonal changes, lifestyle habits, and environmental factors.
Because sleep affects so many aspects of health, improving sleep often requires looking at the body as an interconnected system rather than focusing on one isolated symptom.
Understanding the mechanisms behind insomnia can help people make more informed decisions about how to support their sleep and overall wellbeing.
If you are experiencing persistent sleep difficulties and would like further advice regarding your health, you are welcome to get in touch with the practice for guidance.
What is Insomnia?
Insomnia is more than just a sleepless night. It is a persistent problem with sleep that occurs at least three times a week for three months or longer. There are two main types of insomnia:
Acute Insomnia
This is short-term and often triggered by stressful events such as a major life change, illness, or trauma. Acute insomnia typically lasts for a few days or weeks.
Chronic Insomnia
This type of insomnia lasts for at least three months and occurs on a regular basis. It can be caused by underlying health conditions, lifestyle factors, or psychological issues.
The symptoms of insomnia can include:
- Difficulty falling asleep
- Waking up during the night and not being able to get back to sleep
- Waking up too early in the morning
- Feeling tired or unrefreshed upon waking
- Daytime fatigue or sleepiness
- Irritability or mood changes
These symptoms can significantly impact daily life, affecting concentration, memory, and overall quality of life.
Causes of Insomnia
Insomnia can be caused by a range of factors, including lifestyle habits, psychological issues, and physical health conditions. Some of the most common causes include:
Stress and Anxiety
Stress is one of the most common causes of acute insomnia. Work pressures, financial concerns, relationship problems, and major life changes (such as moving house or the loss of a loved one) can disrupt sleep. Anxiety can also contribute to chronic insomnia. Worrying about sleep can create a vicious cycle that makes it even harder to sleep.
Depression
People with depression often experience sleep problems, including insomnia. It can be difficult for those who are depressed to fall asleep or stay asleep, and they may wake up early in the morning feeling unrested. In fact, sleep disturbances are one of the diagnostic criteria for depression.
Poor Sleep Habits
Lifestyle factors such as irregular sleep schedules, excessive screen time before bed, or drinking too much caffeine or alcohol can all interfere with sleep. For example, the blue light emitted by phones, tablets, and computers can disrupt the production of melatonin, a hormone that helps regulate sleep.
Medical Conditions
Certain medical conditions can cause or worsen insomnia. These include chronic pain (from conditions like arthritis or back problems), asthma, allergies, restless legs syndrome, and gastroesophageal reflux disease (GERD). Neurological disorders like Parkinson’s disease or dementia can also lead to sleep disturbances.
Medications
Some medications, including antidepressants, stimulants, and medications for high blood pressure or allergies, can interfere with sleep. If you suspect your insomnia is caused by medication, it is important to consult with a healthcare provider to adjust the treatment.
Hormonal Changes
Hormonal fluctuations, particularly during menopause or pregnancy, can affect sleep patterns. Hot flushes and night sweats can make it difficult for women to sleep soundly during this time.
Age
Sleep problems become more common with age. Older adults may experience lighter sleep and more frequent awakenings during the night, making it harder to get restorative rest. Changes in the body’s circadian rhythm (the internal body clock) can also contribute to insomnia in older adults.
How Insomnia Affects the Body
While it may seem like a simple problem, chronic insomnia can have a wide range of negative effects on both physical and mental health. Sleep is essential for the body to function properly, and prolonged sleep deprivation can impair many systems in the body.
Cognitive Function and Memory
Lack of sleep has a direct impact on brain function. People with insomnia often experience difficulty concentrating, memory problems, and slower reaction times. Sleep is crucial for cognitive functions like learning, problem-solving, and decision-making. Chronic sleep deprivation can lead to cognitive decline, particularly in older adults.
Mood and Mental Health
Insomnia is closely linked to mental health problems, particularly anxiety and depression. The frustration and stress caused by poor sleep can worsen existing mental health conditions. Moreover, chronic insomnia increases the risk of developing mood disorders. A lack of sleep can also lead to irritability, mood swings, and difficulty managing emotions.
Immune System
Sleep is essential for the immune system to function properly. Chronic insomnia can weaken the immune system, making individuals more susceptible to infections like colds and flu. Lack of sleep also impairs the body’s ability to recover from illness or injury.
Cardiovascular Health
Long-term insomnia can have serious effects on heart health. Research has shown that people with chronic sleep problems have an increased risk of hypertension (high blood pressure), heart disease, and stroke. Sleep deprivation increases levels of stress hormones like cortisol, which can damage blood vessels over time.
Metabolism and Weight Gain
Sleep plays a key role in regulating metabolism and appetite. Chronic insomnia is linked to an increased risk of obesity and type 2 diabetes. Sleep deprivation disrupts the balance of hormones that control hunger, such as leptin (which signals fullness) and ghrelin (which signals hunger), leading to overeating. Additionally, a lack of sleep can reduce the body’s ability to process glucose, increasing the risk of insulin resistance and diabetes.
Chronic Pain
People with chronic pain conditions, such as fibromyalgia or arthritis, are more likely to experience insomnia. Conversely, poor sleep can increase sensitivity to pain, creating a vicious cycle of pain and sleep disruption. Insomnia is also common in conditions like migraines and back pain.
Reduced Quality of Life
Chronic insomnia can significantly reduce overall quality of life. People with insomnia may feel constantly tired and unable to engage in daily activities fully. They may struggle to keep up with work or social commitments, leading to frustration, isolation, and decreased life satisfaction.
Health Implications of Insomnia
The health implications of insomnia are far-reaching and can affect nearly every aspect of life. Here are some of the most significant consequences:
Increased Risk of Accidents
Sleep deprivation impairs alertness, attention, and reaction times, making people with insomnia more prone to accidents. This includes car accidents, workplace injuries, and falls, particularly in older adults.
Chronic Conditions
As mentioned, insomnia is linked to various chronic conditions, including cardiovascular disease, obesity, diabetes, and mental health disorders. These conditions can significantly reduce life expectancy and quality of life if left untreated.
Worsened Existing Conditions
If a person has an existing health condition, insomnia can make it worse. For example, people with heart disease, hypertension, or diabetes may experience a worsening of their symptoms if they do not get enough sleep. Insomnia can also exacerbate the effects of chronic pain.
Impaired Social and Occupational Functioning
Chronic insomnia can make it difficult to concentrate at work, attend social events, or perform daily tasks. People may feel irritable or fatigued, which can strain relationships with colleagues, family, and friends.
Treatment of Insomnia
There are various ways to treat insomnia, depending on its cause and severity. Treatment can include lifestyle changes, therapy, and medication. Whilst medication (sleeping pills) can be useful in emergencies it doesn’t address the root cause of the issue and can lead to a reduction in our deep and REM sleep – far from ideal! The following solutions are directed for those are seeking a more natural solution.
Relaxation Techniques
Any approach that reduces stress in the autonomic nervous system (ANS) will help with insomnia because they put our bodies into the relaxed state controlled by our parasympathetic nervous system (PNS). Yoga, meditation, yoga Nidra, Tai Qi, Qi Gong are all great ways to access these states. We can also find other more personal activities which help us access these states e.g. walking in nature, knitting – anything where we become totally absorbed.
Supplements
There are many supplements that can be helpful for sleep including 5-HTP, melatonin, magnesium, L-theanine, Ashwagandha, B vitamins and more. It is advisable to seek advice that is individually tailored to your needs from a healthcare practitioner if you wish to use supplements.
Lifestyle Changes
Adopting good sleep hygiene can help manage insomnia. This includes maintaining a regular sleep schedule, avoiding caffeine or alcohol close to bedtime, creating a relaxing bedtime routine, and limiting screen time (blue light inhibits the production of melatonin) before sleep. Additionally, making the sleep environment comfortable by keeping the room cool (around 18C is ideal), dark, and quiet can improve sleep quality.
If you or someone close to you is suffering from Insomnia and is seeking further advice and support, you can get in touch with us using the contact page. Good sleep is the bedrock of good health and wellbeing, so addressing the root causes of insomnia is the most important step we can take before any other health interventions.
References
References:
- Morin, C. M., & Benca, R. (2012). Chronic insomnia. *The Lancet, 379*(9821), 2120-2132.
- Walker, M. (2017). *Why We Sleep: The New Science of Sleep and Dreams*. London: Penguin Books.
- Riemann, D., & Voderholzer, U. (2003). Primary insomnia: a risk factor to develop
- Miller, K. E., & Lee, M. (2012). Sleep Disorders and Their Treatment. Handbook of Integrative Clinical Psychology, Psychiatry, and Behavioral Medicine, 2nd Edition. Springer Science & Business Media.
