What are the Most Common Causes of Sleep Disturbance?

This blog is for educational purposes only and does not replace professional medical advice or diagnosis. If you have health concerns, consult an AHPRA-registered telehealth doctor or request a medical certificate online if clinically appropriate. Please note: Hola Health does not currently offer Mental Health Care Plans.

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Overview

Sleep disturbance refers to a range of sleep difficulties, including difficulties falling asleep, staying asleep, or waking too early. It is common across all ages and life stages. Amira, a registered psychotherapist adds – According to the Australian Institute of Health and Welfare¹, around 48% of Australian adults report experiencing at least two sleep-related problems, such as inadequate sleep duration, long sleep latency or frequent awakenings, based on national survey data. For many Australians, sleep disturbances are intermittent and do not always indicate insomnia. There are often multiple contributing factors rather than a single factor. 

Note: The content of this blog is for informational purposes only and does not replace professional medical diagnosis, advice, or treatment.

What is sleep disturbance?

Sleep disturbance refers to persistent difficulties with sleep quality, timing, or duration. It can include:

• Trouble falling asleep
• Waking frequently during the night
• Waking too early and not getting back to sleep
• Poor-quality or unrefreshing sleep

Causes

The most common causes of sleep disturbance include stress, lifestyle habits, health conditions, and environmental factors.

1. Stress and anxiety: Stress and anxiety are among the most common causes of poor sleep. Mental tension can keep the body alert, even at times when it needs to rest. Common experiences include:

• Racing thoughts at night
• Ongoing worries about finance, work, or health
• Anxiety can disrupt normal sleep patterns by increasing physiological arousal (e.g. elevated heart rate or muscle tension)
• Anxiety-related sleep problems are common and often improve with the right support

2. Poor sleep habits: Everyday habits can significantly affect sleep quality, including:

• Irregular sleep schedule
• Excessive screen use before bed
• Caffeine or alcohol late in the day
• Long or late afternoon naps

3. Mental health conditions: Sleep disturbance often occurs alongside mental health conditions like anxiety disorders, depression, and Post Traumatic Stress Disorder (PTSD). In many cases, sleep difficulties are a symptom of the underlying condition rather than a distinct disorder.
4. Physical health conditions: Certain physical health conditions can disrupt sleep, including:

• Chronic pain or joint pain
• Gastrointestinal issues such as reflux or bloating
• Respiratory conditions like asthma or a persistent cough
• Hormonal changes, including menopause or thyroid conditions

Amira, a registered psychotherapist says that “Sleep disorders such as obstructive sleep apnoea or restless legs syndrome”.

5. Medications and substances: Some medications and substances can affect sleep, such as:

• Stimulants, including some cold and flu medications
• Antidepressants or blood pressure medications (in some people)
• Nicotine, alcohol, recreational substances

Never stop or change medication without medical advice.

6. Shift work and irregular schedules: Shift work is common in healthcare, hospitality, and emergency services. It can interfere with the body’s internal clock or circadian rhythm, making nighttime sleep more difficult. As a result, daytime sleep is usually shorter and of poorer quality.

Amira, a registered psychotherapist adds – Long-term shift work may also increase the risk of chronic sleep problems and metabolic health issues.

7. Lifestyle and environmental factors: Sleep can also be affected by:

• Noise, light, or room temperature
• An uncomfortable mattress or pillow
• Travel across time zones or jet lag

How sleep disturbance affects daily life

Persistent sleep problems can lead to:

• Daytime fatigue and low energy
• Poor concentration and memory
• Irritability or low mood
• Increased risk of accidents
• Reduced work or study performance
• Increased long-term risk of conditions such as obesity

When sleep disturbance becomes a health concern

Occasional sleep problems are common, but ongoing difficulties may need review. Sleep disturbance may require medical assessment if it persists or begins to affect quality of life. Signs include:

• Symptoms last more than 2–4 weeks
• Affects daily functioning
• Linked with anxiety or low mood
• Requires regular usage of sleep supports
• Causing concern or distress

Note: If you experience sudden chest pain, severe difficulty breathing, or other life-threatening symptoms, please call 000 immediately or visit your nearest Emergency Department.

Self-care tips to improve sleep

These practical steps may support better sleep:

• Keep consistent sleep and wake times
• Reduce caffeine after midday
• Create a calming wind-down routine before bed
• Limit screen exposure at night
• Get natural daylight exposure
• Engage in regular physical activity

Note: This information is for educational purposes only. You should consult a GP before attempting home remedies or significant lifestyle changes to ensure they are safe for your specific condition.

Conclusion

Sleep disturbance is prevalent and often influenced by multiple factors. Stress, lifestyle factors, medical conditions, and work schedules may all contribute. Understanding the underlying factors is an important first step. With the right support, many Australians can improve their sleep and overall well-being.