Most people who come in describing insomnia have already tried the obvious things. They've cut back on coffee after noon, bought blackout curtains, downloaded a sleep tracking app, and maybe experimented with melatonin. When those things don't work, or stop working, many conclude that their insomnia is "just how they are", a fixed feature of their neurology or constitution. That conclusion is almost always wrong. Insomnia is one of the most treatable conditions in clinical psychology, and the treatment that works best isn't medication. But getting there requires understanding what insomnia actually is, and what it isn't.

Why Insomnia Rarely Starts with Sleep

Insomnia, defined as difficulty initiating or maintaining sleep, or non-restorative sleep, occurring at least three nights per week for at least three months (DSM-5), is almost always a disorder of hyperarousal, not a disorder of the sleep system itself. The brain and body of someone with chronic insomnia are physiologically elevated: higher core body temperature at night, elevated heart rate, more fast-frequency brain activity, and a stress axis (the HPA axis) that doesn't fully downregulate in the evening.

What produces this hyperarousal? Stress is the most common initiating factor. A period of intense pressure, job loss, divorce, illness, a demanding project, disrupts sleep. This is normal. What turns acute sleep disruption into chronic insomnia is the response to that disruption: the worry about sleep, the behavioral changes made to compensate, and the conditioned arousal that develops when the bedroom becomes associated with wakefulness and frustration rather than rest.

By the time someone has been sleeping poorly for a year or more, the original stressor may be long gone, but the insomnia has taken on a life of its own. They lie awake thinking about whether they'll be able to sleep. The anxiety about sleep produces the very arousal that prevents sleep. The cycle is self-sustaining.

The Stress-Sleep Loop: How They Fuel Each Other

The relationship between stress and sleep is bidirectional. Stress disrupts sleep; disrupted sleep increases stress reactivity. Sleep deprivation increases the amygdala's response to negative stimuli by up to 60% (Walker, M., Why We Sleep, 2017), which means a sleep-deprived nervous system is more reactive to stressors, generating more stress, which further disrupts sleep.

Cortisol, the primary stress hormone, follows a diurnal rhythm: it should be lowest at night and peak shortly after waking. Chronic stress flattens and dysregulates this rhythm, keeping cortisol elevated in the evening when it should be declining. This makes falling asleep physiologically harder and contributes to the "tired but wired" state that insomnia sufferers describe so consistently (NIMH, 2023).

Anxiety disorders and insomnia have an especially entangled relationship. Approximately 50% of people with chronic insomnia have a co-occurring anxiety disorder, and the direction of causality can run either way (APA, 2022). This is why treating the insomnia in isolation, without addressing the anxiety, often produces partial or temporary results.

"The goal of insomnia treatment isn't to force sleep. It's to remove the obstacles the nervous system has constructed against it."

CBT-I: Why It Works Better Than Medication

Cognitive Behavioral Therapy for Insomnia (CBT-I) is the first-line, evidence-based treatment for chronic insomnia, recommended above sleep medication by the American College of Physicians, the American Academy of Sleep Medicine, and the APA. In head-to-head trials, CBT-I produces equivalent short-term improvement to sleep medication with significantly better long-term outcomes, because it changes the underlying patterns rather than just managing symptoms (CDC, 2023).

CBT-I typically involves four to eight sessions and combines several components:

  • Sleep restriction therapy, counterintuitively, temporarily reducing time in bed to consolidate sleep and rebuild sleep drive. This is the component clients resist most and the one that tends to work fastest.
  • Stimulus control, reconnecting the bedroom with sleepiness rather than wakefulness by removing activities (screens, work, worrying) from the bed and bedroom.
  • Cognitive restructuring, identifying and challenging the catastrophic thoughts about sleep that perpetuate hyperarousal: "If I don't get eight hours I won't be able to function," "Something must be wrong with me," "I'm ruining my health."
  • Sleep hygiene education, the practical behavioral factors (light, temperature, timing, caffeine, alcohol) that influence sleep architecture.
  • Relaxation training, diaphragmatic breathing, progressive muscle relaxation, and related techniques that directly lower physiological arousal.

A client in her mid-fifties came in having not slept more than four hours consecutively in nearly two years. She had tried three different sleep medications and found they either stopped working or left her groggy. She was skeptical about CBT-I, particularly the sleep restriction component. By session four, she was sleeping six and a half hours consistently. By session seven, she was at her baseline of around seven hours, for the first time in two years, without medication. The change wasn't magic; it was systematic.

Lifestyle Factors That Clinicians Actually Pay Attention To

Beyond the CBT-I framework, a few physiological factors deserve clinical attention and are frequently overlooked:

Alcohol. Widely used as a sleep aid and widely counterproductive. Alcohol increases slow-wave sleep in the first half of the night while suppressing REM sleep and causing fragmented, lighter sleep in the second half. The result is sleep that registers as "sleep" but doesn't restore. For people using alcohol regularly to initiate sleep, addressing this is typically a prerequisite for meaningful improvement.

Exercise timing. Vigorous exercise raises core body temperature and cortisol, which is excellent for daytime alertness and metabolic health, but counterproductive within two to three hours of bedtime. Morning or early afternoon exercise supports sleep; late-evening vigorous workouts can fragment it.

Screen light and timing. Blue-wavelength light suppresses melatonin production. The clinical evidence for blue-light blocking glasses is mixed, but the evidence for reducing bright screen exposure in the 60-90 minutes before bed is more robust.

Unaddressed sleep disorders. Obstructive sleep apnea is significantly underdiagnosed, particularly in women and in people who don't match the stereotypic profile (overweight middle-aged men). If you're sleeping the right amount, doing the behavioral work, and still waking unrefreshed, a sleep study to rule out apnea is worth discussing with your physician.

When Insomnia Is a Symptom of Something Else

Insomnia is a common feature of depression, anxiety, PTSD, and bipolar disorder. In these contexts, treating the insomnia in isolation may produce limited results unless the underlying condition is also being addressed. A clinician doing a thorough intake will ask about mood, anxiety, trauma history, and substance use, not to expand the scope unnecessarily, but because an accurate picture of what's driving the sleep disruption produces a much better treatment plan.

When to Seek Professional Support

If you've been sleeping poorly for more than three months, if sleep deprivation is affecting your mood, your work, or your relationships, or if you've been relying on medication to sleep and aren't satisfied with the results,

Lifespan: Center for Family Psychological Services offers CBT-I and sleep-focused therapy for adolescents and adults in Westlake Village, CA, with telehealth options available. You don't have to keep white-knuckling it through the nights. There's a path through this, and it's well-mapped.