The dreaded sleep regression… Dun dun DUNNNNN! It’s ok. I’m here for you! To begin, there are all sorts of sleep regressions. While some regressions occur due to circumstances like travel or illness (which we’ll discuss below), many occur for seemingly no reason at all. Many researchers have noted that there are certain periods of cognitive and/or physical development (or “leaps”), that tend to seriously affect sleep. Many of you have heard of the Four Month Sleep Regression, and others like it. The Wonder Weeks is a good resource to use to know when developmental leaps occur, and how much they are likely to affect your baby’s sleep. Let’s get into how a sleep regression can affect your baby’s sleep…

Last Updated Feb 2, 2021.

how to deal with sleep regressions

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Sleep Regressions 101

Just like with everything else, every baby reacts differently to developmental leaps. Additionally, some babies will sail through certain leaps without batting an eye, only to be harshly affected by the subsequent leap. The bad news: developmental leaps often do disrupt sleep. The good news: when handled correctly, the sleep issues that arrive along with the leaps need not be permanent.

Aside from developmental leaps, there are two very common scenarios where regressions are likely to occur…

#1 Travel

Travel often disrupts sleep for two reasons. Either the parent chooses to leave behind routines and schedules in favor of a more relaxed vacation. Or, the parent is forced to tend to their baby in ways, and at times they normally would not while at home. Regardless of what transpires on vacation, babies often come home jet lagged and accustomed to a new, more parental-hands on set of sleep associations.

A few “If” tips to avoid sleep regressions due to travel:

*If you are driving four hours or less to your destination, try to leave after your child’s second nap, or after their first nap if they’re down to a single nap per day. That way when you arrive your child can go down for bedtime shortly thereafter.

*If you are driving five to nine hours, leave at, or shortly before bedtime. Once you’ve gotten to your destination, simply keep the child up for about 15-30 minutes, then redo their bedtime routine and put them down for the remainder of the night.

*If you are driving ten hours or more, I would suggest driving during the day starting at whatever time is most convenient. Most babies will not sleep soundly all night in their car seats, and driving through the night increases the likelihood that the driver will have an accident.

*If you are staying in a hotel, be sure to ask for a handicap-accessible room. These often have spacious bathrooms that can accommodate a crib or Pack n’ Play.

*If you are traveling with an infant who is not yet standing and will be sleeping in a Pack n’ Play, consider purchasing a SnoozeShade. If they are standing, consider the Slumberpod. And don’t forget a portable white noise machine.

*If at all possible, give your child at least 15-20 minutes to work though any night wakings they may have before tending to them. (This is assuming they are sleeping through the night prior to you having left on your trip.)

*If at all possible, honor your child’s need to nap in the hotel room/bedroom you’re staying. Especially for their very first nap of the day.

#2 Illness

Illness often (but not always) tends to disrupt sleep for one main reason… The parent reverts to helping the child fall back to sleep. I cannot tell you how.many.times. I get emails from clients whose babies had been sleeping through the night perfectly until they get a cold/cough/teething. In an effort to calm and comfort the child, the parent soothes them with feeding, rocking, or co-sleeping. The illness resolves itself, but many times the new sleep associations linger. Regardless of any new, undesirable sleep associations due to illness, just having an illness that wakes the child at night is enough to keep her waking for days or weeks once she is no longer sick.


So, how do we deal with all these issues?

Developmental leaps

My best piece of advice is not to change anything from what you are currently doing. If you have a fully nap and night trained baby/child and you notice their sleep is disrupted due to a regression (leap or other reason) continue to move forward.

If you do not normally help your child to sleep, do not start to do so now. If you need to shorten their nap times, or put them down earlier to compensate for poor naps – go ahead and do so. But do not revert to helping them fall asleep simply because they are struggling to sleep during the regression/leap. Simply set the schedule and keep them on it. Simply wait out the end of the regression/leap. They usually last anywhere between 4 and 14 days.

If your child is not yet sleep trained, these leaps will often cause a mildly problematic sleep situation to worsen drastically. In this case, I would again suggest trying to continue on with the status quo. Almost certainly parents of non-sleep trained children will choose to use more involved methods to help their child fall back to sleep or work through the regressions. I simply ask those parents to be extremely watchful of when the regression/leap has passed, and to try to immediately scale back the extra help they were giving the child once the regression is over.


Besides following the “If” tips above, I would suggest trying to get your child on the local time zone as quickly as possible. This goes for when you’re on the trip, and for when you arrive back home. The easiest way to get the child back on the local time zone is to make sure they actually wake up and start the day around 6:00 or 7:00 am local time.

Once you arrive back home, if you find that you’ve fallen into some sleep associations you’d like to break, I suggest giving your child one full day for every two hours they were off per time zone before addressing sleep.

For example, if they were off by five hours, you should give them about three days before starting to work on sleep. Once you get them back on their time zone, immediately start back at square one with whatever sleep training method or plan you used when you originally trained them. Keep in mind that methods that worked quickly on younger children tend to illicit a much stronger response from older children.

Be prepared for things to take a full 7-14 days of consistency on your part before things improve. What if you did not have a sleep trained child prior to having left on your trip, and find yourself in a more difficult sleep situation once you return from your travels? Then it is as good a time as any to buckle down and do some sleep training. Feel free to use any method you wish, but do something to address the sleep issues, as they are unlikely to fix themselves (for the long term) on their own.


See the above link for my dedicated blog on this topic! I always tell my clients, if your child is ill, tend to them! Administer Tylenol or another age-appropriate, pain-relieving drug. Give them fluids if necessary, but avoid breastfeeding to sleep at all costs. Instead, give them liquids via a bottle or sippy with a light on. And, of course, change them if they’ve soiled themselves.

The only thing to truly avoid is helping them fall back to sleep. In other words, once you’ve addressed whatever it is that was wrong, put the child back down awake. If they are feeling ill and you administer pain-relieving medicine, make sure to sit with them until the medicine has kicked in. Love them, cuddle them, treat them! But once it is time for them to go back to sleep, they do so on their own.

Once again, this is assuming your child already knows how to put themselves to sleep. If they do not know how to fall asleep on their own, wait until their illness has finished before tackling the issue. Like travel, you may find that illness exacerbates a moderate problem into a full blown sleep-crisis.


Once the child has been illness free for two full days (literally two, full day-time days), check on them if they wake at night, but if they are healthy and safe, leave them immediately. On subsequent nights, if wakings persist, consider whether it is necessary for you to enter the room at all. Watching them via video monitor may be all that’s needed to make sure they fall back to sleep without your help.

I often like to sleep with my children when they’re sick, especially if there is a high fever present. If this is the case for you, I’d suggest moving in a mattress or sleeping bag into the child’s room. Put them down awake, and let them fall asleep on their own. Once they’re totally asleep, enter the room and sleep on the floor next to them. You should definitely monitor your children while they’re ill if you choose to do so. But you want them to fall asleep on their own before you make your way into their room.

Finally, I lump teething into the illness category. Teething almost never disrupts sleep. However, if you find that it is, simply treat the child with a pain-reliever if you choose to do so, stay with the child until the medicine has kicked in, and then put them back down awake.

So remember, when dealing with a sleep regression…

  1. Sleep regressions mainly occur for 3 different reasons: developmental leaps, travel, or illness.
  2. If the regression is a developmental leap, stay the course! You can put baby down for naps and bedtime a little earlier or later. But riding it out by being consistent is the best course of action.
  3. If the regression is due to travel, give your baby a couple days once you get back home (based on the time zone changes) to readjust. And then either scale back your assistance, or re-sleep train.
  4. If the regression is due to sickness, once baby is 100% well for 48-hours, re-sleep train. If they are not sleep trained, consider sleep training!
  5. The best way to avoid non-developmental regressions is to *not assist your child to sleep* in the first place.

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