If your insomnia happens at least three nights a week and has lasted for three months or longer, that meets the clinical threshold for chronic insomnia disorder, and it’s time to see a doctor. But you don’t necessarily need to wait that long. Even a few weeks of poor sleep that interferes with your ability to work, drive safely, or function during the day warrants a conversation with your primary care provider.
The Three-Month, Three-Night Rule
Sleep medicine uses a clear diagnostic line: difficulty falling asleep, staying asleep, or waking too early, occurring at least three nights per week for three or more months. That’s the definition of chronic insomnia disorder. Episodes lasting between one and three months are classified as episodic insomnia, and if you’ve had two or more episodes within a year, that’s considered recurrent insomnia. All three patterns are worth discussing with a doctor, but the three-month mark is particularly important because insomnia that persists this long rarely resolves on its own and tends to become self-reinforcing.
Many people wait far longer than they should. Insomnia is one of the most underdiagnosed conditions in primary care, partly because patients don’t bring it up and partly because doctors don’t always ask. If sleep has been a problem for weeks, not just a few rough nights, you’re not overreacting by scheduling an appointment.
Signs Your Insomnia Needs Professional Attention
Beyond the duration threshold, certain daytime symptoms signal that your sleep loss is affecting your health and safety in ways you shouldn’t try to manage alone:
- Slowed reaction times, especially while driving. Being awake for 17 hours produces impairment similar to a blood alcohol level of 0.05%. At 24 hours without sleep, impairment is equivalent to a BAC of 0.10%, which exceeds the legal limit for driving in the United States.
- Memory problems or difficulty concentrating that affect your work or daily responsibilities.
- Mood changes like persistent irritability, anxiety, or feelings of depression that weren’t there before.
- Pulling back from social activities, hobbies, or responsibilities because you’re too tired.
A useful self-check is the Epworth Sleepiness Scale, a short questionnaire that rates how likely you are to doze off during routine activities like reading, watching TV, or sitting in traffic. A score above 10 (out of 24) indicates excessive daytime sleepiness. A score above 15 suggests severely excessive sleepiness. You can find the questionnaire online and bring your score to your appointment.
When Insomnia Points to Something Else
Insomnia isn’t always its own problem. It can be a symptom of another condition, and a doctor can help sort out what’s actually going on. The overlap between insomnia and mental health conditions is striking: roughly 60% of people with depression and 55 to 59% of people with anxiety disorders also meet criteria for insomnia. In many cases, treating the underlying condition improves sleep, and in others, the insomnia needs to be addressed directly alongside it.
Medications can also be the culprit. Several common prescription drug classes interfere with sleep, including certain blood pressure medications, some antidepressants, steroids, thyroid hormones, bronchodilators, and anti-seizure drugs. Over-the-counter products containing caffeine (like some pain relievers and headache medications) and nasal decongestants can quietly sabotage sleep too. If your insomnia started or worsened after beginning a new medication, that connection is worth raising with your doctor. Never stop a prescribed medication on your own, but a dosage adjustment or switch may be all it takes.
Your doctor will also want to rule out other sleep disorders. Gasping or choking during sleep, loud snoring, or an irresistible urge to move your legs at night suggest conditions like sleep apnea or restless legs syndrome, which require different treatment than straightforward insomnia.
What Happens at the Appointment
A primary care doctor can diagnose and begin treating most insomnia. The visit typically involves a review of your sleep patterns, medical history, medications, and any mental health symptoms. In some cases, your doctor may order blood work to check for thyroid issues or other contributors.
The most important thing you can bring is data. The National Sleep Foundation recommends keeping a sleep diary for at least two weeks before your appointment. Each day, note when you got into bed, roughly how long it took to fall asleep, how many times you woke during the night, when you got up for the day, and how rested you felt. Also track caffeine and alcohol intake, exercise, and any naps. Patterns in this diary often reveal triggers you might not notice otherwise, like sleeping better on days you skipped afternoon coffee.
If your insomnia doesn’t respond to initial treatment, or if your doctor suspects a separate sleep disorder, you may be referred to a board-certified sleep specialist. While conditions like sleep apnea and narcolepsy are routinely sent to specialists, insomnia often stays in primary care, which can lead to it being undertreated. If you’ve been prescribed sleeping pills without any discussion of behavioral approaches, or if months have passed without improvement, asking for a specialist referral is reasonable.
Why the First-Line Treatment Isn’t Medication
The American Academy of Sleep Medicine’s strongest recommendation for chronic insomnia is cognitive behavioral therapy for insomnia, commonly called CBT-I. This is the only treatment that received their highest-level endorsement. It’s a structured program, typically four to eight sessions, that addresses the thoughts and habits that keep insomnia going. Components include stimulus control (rebuilding the association between your bed and sleep), sleep restriction (temporarily limiting time in bed to increase sleep pressure), and relaxation techniques.
Notably, the AASM specifically recommends against using sleep hygiene alone as a treatment. Keeping your room dark and avoiding screens before bed are helpful habits, but they’re not sufficient to treat chronic insomnia on their own. If you’ve already tried all the standard sleep hygiene advice and you’re still struggling, that’s actually a strong signal that professional treatment is the next step, not that you need to try harder.
CBT-I is available through in-person therapists, telehealth, and even app-based programs. Your doctor can help you find the right format. Many people see significant improvement within a few weeks.
The Cost of Waiting Too Long
Chronic poor sleep is not just miserable in the short term. Over time, it increases the likelihood of developing heart disease, type 2 diabetes, obesity, and dementia. There are also links to higher rates of breast, colon, ovarian, and prostate cancers. These aren’t risks from a single bad night; they accumulate with months and years of consistently poor sleep.
The daytime safety risks are more immediate. Drowsy driving alone causes thousands of crashes each year, and the impairment from sleep deprivation is comparable to drunk driving well before most people realize how compromised they are. If you’ve caught yourself drifting at the wheel, missing exits, or jerking awake at a stoplight, the urgency is now, not at your next annual physical.