Causes and Risk Factors
Insomnia usually has more than one contributing cause, and identifying those contributors is the first step toward better sleep:- Stress and life events: Work pressures, grief, illness, or major life changes can keep the mind active at night and start a self-perpetuating cycle of poor sleep.
- Sleep habits: Irregular bedtimes, late-evening screen use, long daytime naps, and caffeine or alcohol close to bedtime all interfere with the body's natural sleep drive.
- Shift work and travel: Overnight or rotating schedules and frequent time-zone changes push the body's internal clock out of sync with the hours you want to sleep.
- Mental health conditions: Insomnia is closely linked with anxiety and depression, and each condition can worsen the other.
- Medical conditions: Chronic pain, nighttime heartburn from acid reflux, an overactive thyroid, frequent nighttime urination, and sleep apnea can all fragment sleep.
- Medications and substances: Some antidepressants, steroids, decongestants, and stimulants, as well as nicotine and alcohol, disturb normal sleep patterns.
Symptoms
People with insomnia may notice:- Difficulty falling asleep: Lying awake for long stretches at bedtime despite feeling tired.
- Frequent awakenings: Waking during the night and struggling to return to sleep.
- Early-morning waking: Waking well before the alarm and being unable to doze off again.
- Daytime effects: Fatigue, irritability, low mood, trouble concentrating, and drowsiness while driving or working.
- Worry about sleep: Growing anxiety about bedtime itself, which further delays sleep.
Diagnosis
Insomnia is diagnosed primarily from your history: sleep patterns, bedtime routine, caffeine and alcohol use, medications, mood, and daytime symptoms. Keeping a sleep diary for one to two weeks is often revealing. If you snore loudly, gasp during sleep, or a partner has witnessed pauses in your breathing, your physician may order a sleep study to check for sleep apnea, and blood tests can rule out contributors such as thyroid disease. Short-term insomnia often improves once a triggering stress passes; insomnia that persists for three months or more rarely resolves without targeted treatment, so it is worth raising at your next visit.Treatment
Treatment targets both the habits that maintain insomnia and any underlying conditions:- Cognitive behavioral therapy for insomnia (CBT-I): The recommended first-line treatment. CBT-I retrains unhelpful thoughts and behaviors around sleep and produces more durable results than medication alone.
- Sleep habits: A consistent wake time, a dark and cool bedroom, limiting caffeine after midday, avoiding alcohol near bedtime, and reserving the bed for sleep.
- Medications: When appropriate, options include sedative-hypnotics such as zolpidem, orexin receptor antagonists such as suvorexant and lemborexant, and low-dose sedating antidepressants such as trazodone. These are generally used at the lowest effective dose for the shortest practical time under medical supervision.
- Treating underlying conditions: Managing pain, reflux, mood disorders, or thyroid problems often improves sleep on its own.
Getting Insomnia Treatment to Work
Chronic insomnia is treatable in most people, yet the treatment that works best is the one least often tried. The details below cover what CBT-I actually involves, how sleep medications are used without creating a second problem, and the conditions that masquerade as insomnia.
What CBT-I actually asks of you
Cognitive behavioral therapy for insomnia is a structured program of roughly six sessions, not general advice about sleep hygiene. Its core is temporarily restricting time in bed to the hours actually slept so the drive to sleep rebuilds, getting out of bed whenever awake for more than about twenty minutes, and a fixed wake time seven days a week. The first two weeks feel worse before sleep consolidates, which is where most people quit; knowing that in advance is half the treatment. It is available in person, by telehealth, and through validated digital programs, and it outperforms medication after the first few months. Our CBT-I guide explains how to get started.
Sleep medication without the second problem
Zolpidem works for falling asleep but carries next-morning impairment, falls, and rare complex sleep behaviors such as sleep-driving, and is meant for short courses at the lowest dose. Suvorexant and lemborexant quiet the wake signal rather than sedating, with less dependence and fewer falls, and suit people who wake repeatedly. Low-dose trazodone is widely used but has thin evidence. Diphenhydramine, the ingredient in most over-the-counter sleep aids, causes confusion and falls in older adults and is avoided; benzodiazepines used nightly for years are tapered rather than stopped, as our benzodiazepines in older adults article explains. Melatonin helps timing more than insomnia itself; our melatonin guide covers dose and safety.
The conditions that masquerade as insomnia
Waking unrefreshed with snoring is sleep apnea until a sleep test says otherwise, and sedatives make it worse. An urge to move the legs in the evening is restless legs syndrome, often from low iron. Night sweats in perimenopause, nighttime urination from an enlarged prostate, nighttime reflux, and an overactive thyroid each fragment sleep and are treated directly. Anxiety and depression travel with insomnia in both directions, and treating one improves the other.
Light, heat, and the Florida bedroom
Bright morning light anchors the body clock and evening screens delay it; our circadian rhythm guide and humidity and light article cover the local specifics, including keeping the bedroom cool and dry enough to sleep through a summer night. Alcohol shortens the time to fall asleep and then fragments the second half of the night, and is one of the most common hidden causes.
When to be seen
Insomnia lasting three months, daytime sleepiness that affects driving, or a sleep aid taken nightly for more than a few weeks each warrant a visit. Our psychiatric team coordinates CBT-I referral and medication review. The NHLBI, the American Academy of Sleep Medicine, and MedlinePlus publish patient guidance on treatment.
If poor sleep has lasted more than three months and nobody has offered you CBT-I, schedule a visit.