What Is Insomnia?
Causes, Symptoms, and How to Restore Natural Sleep
Difficulty sleeping is one of the most common health concerns across all age groups. Many people experience periods where sleep feels elusive, fragmented, or unrefreshing — particularly during times of stress or change. For some, however, this becomes a persistent pattern that affects both night-time rest and daytime wellbeing.
Insomnia is not simply about “not sleeping enough.” It is a complex condition involving the brain, nervous system, behaviour, and environment. Understanding how insomnia develops — and how it can be effectively treated — is the first step towards restoring natural, restorative sleep.
Grace London Clinical Perspective
Insomnia is best understood as a condition of heightened arousal within the brain and nervous system, rather than a failure of sleep itself. In many cases, the body retains the ability to sleep, but the conditions required for sleep — physiological, psychological, and behavioural — are disrupted.
At Grace London, we view insomnia through an integrative lens, recognising the interaction between sleep physiology, stress response, circadian rhythm, hormonal influences, and lifestyle factors. While insomnia can feel distressing, it is also highly treatable. Importantly, unlike conditions such as obstructive sleep apnoea, insomnia is not typically associated with the same long-term cardiovascular risks, although it can significantly affect quality of life, mood, and daily function.
What Is Insomnia?
Clinically, insomnia is defined as:
- Difficulty falling asleep
- Difficulty staying asleep
- Waking earlier than intended
- Sleep that feels non-restorative
…occurring despite adequate opportunity for sleep, and associated with daytime consequences such as fatigue, reduced concentration, or mood disturbance.
Insomnia may be:
Acute (Short-Term)
Lasting days to weeks, often triggered by:
- Stressful life events
- illness
- travel or jet lag
- environmental disruption
Chronic (Long-Term)
Persisting for three months or longer, typically involving a combination of initial triggers and ongoing perpetuating factors.
How Common Is Insomnia?
Insomnia is extremely common.
- Around 30–40% of adults report symptoms of insomnia at some point
- Approximately 10–15% experience chronic insomnia disorder
- Up to one third of the population may experience an episode of insomnia each year
At a clinical level, it is helpful to reassure patients that almost everyone will experience disrupted sleep at some stage in life. For many, it is a temporary phase. For others, the pattern becomes more persistent and requires targeted intervention.
What Causes Insomnia?
A useful way to understand insomnia is through the “3P model”:
Predisposing Factors
These make an individual more vulnerable to insomnia:
- Genetic tendency towards heightened arousal
- Personality traits such as perfectionism or anxiety sensitivity
- baseline stress reactivity
Precipitating Factors
These are the initial triggers:
- Stress or life transitions
- illness or pain
- work pressure
- relationship difficulties
- travel or circadian disruption
Perpetuating Factors
These maintain insomnia over time, even after the original trigger resolves:
- Irregular sleep schedules
- Spending excessive time in bed
- Daytime napping
- Increased focus on sleep
- Anxiety about not sleeping
- Associating the bedroom with wakefulness
It is these perpetuating factors that often require targeted treatment.
How Insomnia Affects People
Insomnia is not simply a night-time issue — it often has a significant daytime impact.
Night-Time Experience
- Difficulty “switching off”
- Racing thoughts at bedtime
- Heightened awareness of being awake
- Increasing frustration or anxiety around sleep
- Bedroom becoming associated with wakefulness rather than rest
Many individuals describe feeling trapped in a cycle where the more they try to sleep, the more difficult it becomes.
Daytime Effects
- Fatigue or low energy
- Reduced vitality
- Difficulty concentrating
- Memory impairment
- Irritability or mood disturbance
- Reduced resilience to stress
Importantly, many people with insomnia feel tired but not sleepy — a key distinction from conditions such as sleep apnoea.
The Role of Anxiety and Mood
Insomnia and mental health are closely linked.
There is a bidirectional relationship between insomnia and:
- Anxiety
- Depression
- Stress-related disorders
Insomnia can:
- Increase emotional reactivity
- reduce coping capacity
- worsen mood symptoms
At the same time, anxiety and depression can:
- increase mental arousal
- disrupt sleep initiation
- fragment sleep
This interplay often creates a self-reinforcing cycle that requires a combined and thoughtful approach.
Is Insomnia Harmful to Long-Term Health?
While insomnia can significantly affect quality of life, it is important to provide reassurance:
- Insomnia is not associated with the same direct cardiovascular risks seen in untreated obstructive sleep apnoea
- It does not typically lead to dangerous drops in oxygen levels or repeated breathing interruptions
However, chronic insomnia can still have meaningful effects on:
- mood and mental health
- cognitive performance
- stress physiology
- overall wellbeing
Addressing insomnia is therefore important — not because it is dangerous in the same way as sleep apnoea, but because of its impact on quality of life and function.
When Should You Seek Help for Insomnia?
Clinical support may be helpful if:
- Sleep difficulty persists for several weeks or longer
- Daytime functioning is affected
- Anxiety around sleep is increasing
- Sleep feels unpredictable or out of control
- Self-help strategies have not been effective
Early intervention can prevent insomnia from becoming a long-term pattern.
How Is Insomnia Managed?
The most effective treatment for chronic insomnia is Cognitive Behavioural Therapy for Insomnia (CBT-I).
CBT-I (Cognitive Behavioural Therapy for Insomnia)
CBT-I is a structured, evidence-based approach that addresses:
- Sleep behaviours
- Thought patterns around sleep
- Sleep scheduling and timing
- Conditioning between bed and sleep
Key components include:
- Stimulus control (rebuilding the bed–sleep association)
- Sleep restriction (consolidating sleep drive)
- Cognitive restructuring (reducing anxiety around sleep)
- Circadian rhythm alignment
CBT-I is widely considered the first-line treatment for chronic insomnia and is often more effective than medication in the long term.
Pharmacological Management of Insomnia
While behavioural and lifestyle approaches such as CBT-I form the foundation of long-term insomnia management, medication can play a supportive and time-limited role in selected individuals.
At Grace London, we consider pharmacological options carefully, with an emphasis on safety, appropriateness, and long-term sustainability.
Melatonin
Melatonin is a hormone produced by the brain that helps regulate the body’s internal clock (circadian rhythm). Supplementation can be useful in situations where sleep timing or circadian alignment is disrupted.
In the UK:
- Prolonged-release melatonin is licensed for adults over 55 with chronic insomnia
- It may also be used off-label in younger individuals where clinically appropriate
- It is particularly helpful in:
- Delayed sleep phase (difficulty falling asleep late and waking late)
- Circadian rhythm disruption
- Some cases of age-related sleep fragmentation
Melatonin is not a sedative in the traditional sense. Instead, it works by signalling to the brain that it is time to sleep, helping to stabilise sleep timing rather than forcing sleep onset.
Sedative Hypnotics
Traditional sleeping tablets (such as benzodiazepines and “Z-drugs” like zopiclone) can be effective in the short-term management of acute insomnia, particularly during periods of significant stress or transient disruption.
However, they are generally not recommended for long-term use due to:
- Risk of tolerance and dependence
- Reduced effectiveness over time
- Residual next-day sedation
- Impact on sleep architecture
- Potential cognitive and balance effects, particularly in older adults
For these reasons, at Grace London we typically avoid sedative hypnotics as a long-term strategy, instead focusing on approaches that restore natural sleep regulation.
DORA Medications (Dual Orexin Receptor Antagonists)
A newer class of medications — known as Dual Orexin Receptor Antagonists (DORAs) — represents an important development in insomnia treatment.
These medications work by:
- Blocking orexin, a neurochemical that promotes wakefulness
- Reducing excessive wake drive rather than sedating the brain
This mechanism is more aligned with the underlying physiology of insomnia, particularly in individuals with heightened arousal or “overactive wakefulness systems.”
Potential advantages include:
- More natural sleep induction
- Less disruption of sleep architecture
- Lower risk of dependence compared to traditional hypnotics
- Reduced next-day sedation in many patients
DORAs are increasingly being used in specialist practice and may be considered in selected cases where behavioural approaches alone are insufficient.
A Balanced Approach
Medication can be helpful, but it is rarely a complete solution on its own.
The most effective long-term strategy typically involves:
- Addressing behavioural and psychological factors (CBT-I)
- Optimising circadian rhythm
- Supporting metabolic and hormonal health
- Using medication selectively where appropriate
At Grace London, pharmacological treatments are used as part of a broader, integrated approach, with the aim of restoring natural, sustainable sleep rather than reliance on medication.
The Grace London Approach
At Grace London, we take a holistic and personalised approach to insomnia, recognising that sleep is influenced by multiple interconnected systems.
In addition to CBT-I principles, we consider:
Hormonal Factors
- Menopause and perimenopause
- Hormonal fluctuations affecting sleep quality and temperature regulation
Lifestyle and Nutritional Influences
- Caffeine and alcohol intake
- meal timing
- micronutrient status
- metabolic health
Stress and Nervous System Regulation
- Chronic stress patterns
- breathwork and relaxation techniques
- psychological resilience
Circadian Rhythm Alignment
- Light exposure timing
- sleep–wake scheduling
- behavioural rhythms
This integrated approach allows us to move beyond symptom management and support long-term restoration of natural sleep.
Frequently Asked Questions
Is insomnia the same as not sleeping enough?
No. Insomnia involves difficulty sleeping despite having the opportunity to sleep, often due to heightened arousal or behavioural factors.
Can insomnia go away on its own?
Yes, particularly in acute cases. However, if symptoms persist, targeted intervention such as CBT-I is often required.
Do I need a sleep test for insomnia?
In most cases, insomnia is diagnosed clinically. A sleep study may be considered if another sleep disorder is suspected.
Final Thoughts
Insomnia is one of the most common and distressing sleep conditions, yet it is also highly treatable. While it can significantly affect energy, mood, and quality of life, it does not carry the same physiological risks as some other sleep disorders.
Understanding insomnia as a condition of heightened arousal rather than sleep failure can be an important shift. With the right support and targeted strategies, many individuals can restore natural, restorative sleep and regain a sense of control and confidence around their nights.
For many, addressing insomnia is the key to reclaiming calm evenings, restorative rest, and renewed daytime vitality.