Understanding insomnia and its causes#

Insomnia — difficulty falling or staying asleep — affects around one in three UK adults, with around 10% experiencing chronic insomnia (poor sleep at least three nights per week for three months or more). The causes are complex and multifactorial: psychological stress and anxiety, poor sleep hygiene, shift work, medications, underlying health conditions and environmental factors (noise, light, temperature) all play a role.

A mattress cannot treat psychophysiological insomnia — the most common form, characterised by learned associations between the bed and wakefulness. For this, Cognitive Behavioural Therapy for Insomnia (CBT-I) is the first-line treatment recommended by the NHS. However, physical discomfort is a real barrier to sleep, and removing it can meaningfully improve sleep initiation and maintenance.

Physical factors that can worsen insomnia#

  • Pain and pressure points: An uncomfortable mattress creates pain that makes falling asleep harder and wakes you during sleep. Memory foam mattresses excel at reducing pressure-related arousal.
  • Sleeping too hot: Elevated core body temperature actively inhibits sleep onset. The body needs to cool slightly to initiate sleep. A mattress that retains heat can significantly delay sleep onset.
  • Partner disturbance: If a partner's movement regularly wakes you, poor motion isolation is contributing to your insomnia. Memory foam and hybrid mattresses with foam comfort layers reduce this substantially.
  • Noise from the mattress: Squeaking springs can be a micro-arousal trigger for light sleepers. Memory foam and latex mattresses are completely silent.

What to look for in a mattress for insomnia#

  • Comfort at the correct firmness: The most important factor. An uncomfortable mattress is a significant arousal stimulus. Get the firmness right for your sleep position.
  • Good temperature regulation: Hybrid or latex over all-foam to minimise heat retention.
  • Motion isolation: Memory foam or foam-heavy hybrid if partner disturbance is a factor.
  • Silence: Avoid older sprung mattresses if noise is a trigger for you.
  • Long trial period: Insomnia can worsen transiently when adjusting to a new sleep environment. A 100+ night trial allows adequate assessment time.

Sleep hygiene alongside your mattress choice#

The most effective approach to insomnia combines a physically comfortable sleep environment with good sleep hygiene:

  • Consistent sleep and wake time, even at weekends
  • Bedroom temperature between 16–18°C
  • Darkness (blackout blinds or eye mask)
  • No screens for at least 30 minutes before bed
  • Avoidance of caffeine after 2 pm
  • Regular physical activity (but not within 3 hours of bedtime)

For persistent insomnia, ask your GP for a referral for CBT-I — it has superior long-term outcomes to any medication or physical intervention alone.