The treatments with the clearest AASM support are planned naps before or during the night shift, timed light at work with less morning light, and melatonin timing before daytime sleep. AASM rates naps a Standard, light and melatonin a Guideline, and caffeine an Option [1]. These labels describe certainty, not a promise of sleep. No plan makes day sleep identical to night sleep, and no plan changes a schedule your employer controls.

Is this really shift work sleep disorder?

Shift work sleep disorder is a circadian rhythm sleep disorder. Your body clock is out of step with your work hours. You have to be awake when your body expects sleep, then try to sleep when your body expects wakefulness [2].

A new shift can cause rough sleep at first. Ongoing trouble falling asleep or staying asleep after several weeks, or feeling tired even after 7 to 8 hours of sleep, is a signal of possible shift work sleep disorder [2]. Symptoms can include excessive sleepiness, low energy, trouble concentrating, headaches, poor mood, and irritability [2].

Research by Drake and colleagues estimated shift work sleep disorder in approximately 10% of the night and rotating shift work population [7]. That is an estimate, not a diagnosis. The same schedule can affect workers differently. Night owls may adjust more easily to evening work. Morning types may have an easier time with early morning shifts [2].

Symptoms often last while the same shift schedule continues. They tend to go away after returning to a conventional sleep time, though some people keep sleep problems after the schedule ends [2]. If your symptoms continue, the problem deserves a clinical review rather than more pressure to tolerate it.

Start with the shift work sleep disorder overview. The broader sleep hub has related guidance for night and rotating shift work.

What do the AASM grades actually mean?

AASM uses 3 labels for these practice parameters. A Standard is a generally accepted patient-care strategy that reflects a high degree of clinical certainty. A Guideline reflects a moderate degree of clinical certainty. An Option reflects uncertain clinical use [1].

A Standard is the strongest label in this set. It still does not mean every worker will respond the same way. Planned napping before or during a night shift is rated a Standard because it is indicated to improve alertness and performance among night shift workers [1].

A Guideline means the approach has useful support, with more uncertainty than a Standard. Timed light exposure at work, with light restriction in the morning when feasible, is rated a Guideline to decrease sleepiness and improve alertness during night work [1]. Melatonin before daytime sleep is also rated a Guideline to promote daytime sleep among night shift workers [1].

An Option means clinical use is uncertain. Caffeine is rated an Option to enhance alertness during the night shift [1]. That grade is not a command to use it. It means the call depends on your response, timing, health history, and sleep medicine clinician when needed.

Here is the short version to save:

Approach AASM grade What the grade means Concrete first step
Planned nap before or during the night shift Standard Generally accepted strategy with high clinical certainty Plan a nap before returning to work when possible [1][4]
Timed light at work with morning light restriction Guideline Moderate clinical certainty Spend as much time as possible in a brightly lit area during the first half of the shift, then reduce light during the second half [1][3]
Melatonin before daytime sleep Guideline Moderate clinical certainty Discuss timing before daytime sleep with a sleep medicine clinician. Light controls when the body makes this hormone [1][2]
Caffeine during the night shift Option Uncertain clinical use Treat it as a clinician-guided choice, not the base of your plan [1]

How do I use naps and light on my next night shift?

Make the nap the first graded step. NIOSH advises a nap before returning to work when possible. It can increase total sleep time and may help you stay alert during the night shift [4]. The AASM grade is a Standard, but your nap may be short, broken, or impossible in your home. The plan has to allow for that.

When you start work, spend as much time as possible in brightly lit areas during the first half of the shift. NIOSH gives this advice to help you stay alert. During the second half, reduce light exposure so sleep may be easier after you get home [3]. A brightly lit break area is a real place to use this plan. It is not a demand to redesign your workplace.

The drive home needs its own rule. Sunglasses after a night shift can block the alerting effect of light and add to drowsy driving danger. NIOSH says to wear sunglasses after a night shift only when someone else is driving you home [3]. If you are falling asleep while driving, get in-person medical care. Do not try to solve that with light timing.

When you arrive home, go directly to bed. NIOSH advises getting as much sleep as possible before 2pm because the early morning hours are prime sleep time, not chore time [4]. No plan can make day sleep identical to night sleep. The aim is to give your body clock fewer obstacles.

How do I make daytime sleep possible?

Start with the room, not with willpower. NIOSH advises making the bedroom so dark that you cannot see your hand in front of your eyes, or wearing an eye mask [4]. Use blackout shades or drapes. Block light under doorways and around windows in the bedroom, bathroom, and the path between them. Use a dim red nightlight for brief wake-ups [4].

Block sound with ear plugs or a white noise machine. Keep your phone from waking you. Ask family and friends not to disturb your daytime sleep [4]. These are small changes, but each one removes a signal that tells your body it is daytime.

If hunger is likely to cut sleep short, NIOSH advises a small meal with a protein and a carbohydrate before bed when you have not eaten for several hours. Cereal and milk is one example from the training [4]. NIOSH diet guidance also advises avoiding or reducing food intake between midnight and 6am, keeping a normal day-and-night meal pattern as much as possible, and dividing eating into 3 meals per 24-hour period [5].

Melatonin is the body's sleep-promoting hormone. Light and the absence of light help control when your body produces it. In shift work disorder, production can occur when you need to be awake, while sunlight can prevent production when you are supposed to sleep [2]. AASM rates taking melatonin before daytime sleep as a Guideline [1]. This is about body-clock timing and mechanism only. It is not a discussion of a product or amount.

If you need more than this behavioral protocol, prescription options exist and belong with a sleep medicine clinician.

Is caffeine enough to treat the problem?

No. AASM rates caffeine as an Option for enhancing alertness during the night shift, which means uncertain clinical use [1]. That is a weaker grade than planned napping, timed light, or melatonin timing. Caffeine should not become the whole plan for a body clock that is inverted against your schedule.

The first half of the shift is the better place to build alertness with light. The second half is the time to reduce light before you go home [3]. A nap before work may increase total sleep time and may help you stay alert during the shift [4]. Those steps address the schedule from more than one direction.

Adults age 18 to 60 need 7 or more hours of sleep daily. Adults 61 to 64 need 7 to 9 hours [6]. Night shift workers usually get less sleep overall and poorer quality sleep than day shift workers, so NIOSH advises spending as much time in bed as possible to avoid chronic sleep loss [4]. If you sleep 7 to 8 hours and still feel tired, or trouble falling asleep or staying asleep continues after several weeks, possible shift work sleep disorder deserves clinical attention [2].

Shift work disorder can raise the risk of work-related injuries, mistakes at work, increased sick time, and accidents from drowsy driving [2]. Anyone with loud snoring, gasping awake, or choking in sleep needs in-person medical care for possible sleep apnea. Anyone falling asleep while driving needs in-person medical care first.

Low mood can happen alongside shift work problems. Be gentle with yourself. If you may hurt yourself or cannot stay safe, call or text 988, or use online chat with the 988 Suicide and Crisis Lifeline. It is free, confidential, and available 24/7/365 in the United States [8].

Third Shift is a cash-pay telehealth brand for night and rotating shift workers. Its planned circadian assessment and protocol covers light exposure, planned napping, meal timing, and melatonin timing, anchored to the AASM grades and NIOSH guidance. It is planned at $79 one-time, planned launch pricing, behind the waitlist. Its planned sleep program is $89/mo, planned launch pricing, also behind the waitlist. Third Shift is pre-launch, waitlist-only today, with no live checkout, and it never promises sleep outcomes.

What to do next

Tonight or your next shift

  1. Put blackout shades or an eye mask beside the bed before leaving for work.
  2. Plan a nap before returning to work when possible [4].
  3. Use the brightly lit break area during the first half of the shift, then reduce light during the second half [3].
  4. Avoid sunglasses on the drive home unless someone else is driving you [3].
  5. Go directly to bed after arriving home, with a goal of being in bed before 2pm [4].
  6. Put the phone on a setting that will not wake you, and use ear plugs or a white noise machine [4].
  7. If you are falling asleep while driving, stop driving and get in-person medical care.
  8. If you have loud snoring, gasping awake, or choking in sleep, arrange in-person medical care for possible sleep apnea.

This week

  1. Set a calendar reminder before 2pm for your sleep window on each night-shift day.
  2. Ask household members not to disturb your daytime sleep [4].
  3. Block light under the bedroom door and around the windows [4].
  4. Keep food intake low or avoid eating between midnight and 6am, and work toward 3 meals per 24-hour period [5].
  5. Write down when you sleep, when you wake, and whether you feel tired after 7 to 8 hours.
  6. Bring that record to a sleep medicine clinician if symptoms continue after several weeks [2].
  7. Use the melatonin timing guide for night shift for the body-clock mechanism and timing questions.

Sources

  1. AASM practice parameters for circadian rhythm sleep disorders, grades and recommendations for naps, light, melatonin timing, and caffeine, accessed 2026-08-05, https://pmc.ncbi.nlm.nih.gov/articles/PMC2082098/
  2. AASM Sleep Education, shift work page, symptoms, body-clock mechanism, risks, and adjustment signals, accessed 2026-08-05, https://sleepeducation.org/sleep-disorders/shift-work/
  3. NIOSH training for nurses on shift work, light page, light timing and sunglasses after night work, accessed 2026-08-05, https://www.cdc.gov/niosh/work-hour-training-for-nurses/longhours/mod9/03.html
  4. NIOSH training for nurses on shift work, sleep page, naps, daytime sleep, bedroom darkness, noise, and bedtime timing, accessed 2026-08-05, https://www.cdc.gov/niosh/work-hour-training-for-nurses/longhours/mod9/05.html
  5. NIOSH training for nurses on shift work, diet page, meal timing and food choices, accessed 2026-08-05, https://www.cdc.gov/niosh/work-hour-training-for-nurses/longhours/mod9/08.html
  6. CDC, About Sleep page, recommended sleep duration and health effects, accessed 2026-08-05, https://www.cdc.gov/sleep/about/index.html
  7. Drake and colleagues, shift work sleep disorder prevalence, Sleep journal, estimated prevalence among night and rotating shift workers, accessed 2026-08-05, https://academic.oup.com/sleep/article-abstract/27/8/1453/2696766
  8. 988 Suicide and Crisis Lifeline, free confidential crisis support available 24/7/365, accessed 2026-08-05, https://988lifeline.org/