A baby who fights sleep isn't being difficult. There's almost always a reason, and once you understand it, things start to shift.
If bedtime has become a nightly battle of rocking, bouncing, shushing, and pacing, only for your baby to arch their back, cry harder, and resist the very thing they clearly need, I want you to know: this is not your fault. You haven't missed a window. You haven't created a bad habit. You have a baby whose body is struggling to make the transition from awake to asleep, and that's incredibly common.
Babies fighting sleep is one of the things parents ask me about most. It can feel so confusing, because you can see how tired they are. The rubbing eyes, the yawning, the grizzling. And yet the harder you try to settle them, the more they resist. It's exhausting and demoralising in equal measure.
Why it happens
The most common reason a baby fights sleep is overtiredness. It sounds backwards, but when a baby stays awake too long past their sleep window, their body produces a burst of energy to keep them going. This makes them look wired, not tired, and it makes settling them much harder. The fight you're seeing isn't defiance. It's a baby whose body has tipped past the point of being able to wind down easily.
Undertiredness is the flip side. If your baby hasn't been awake long enough to build up enough sleep pressure, they simply won't be ready to sleep, no matter how perfect the routine is. This is especially common when wake windows shift as babies grow, and the timings that worked last month no longer apply.
Overstimulation can play a role too. A busy day, a noisy environment, lots of visitors, or too much screen time close to bedtime can leave a baby's brain buzzing in a way that makes it very hard to switch off. And sometimes, babies fight sleep because they're going through a developmental leap and their brain is simply too busy processing new skills to rest.
What actually helps
The single most helpful thing is getting the timing right. Pay close attention to your baby's tired cues (yawning, turning away, rubbing eyes, becoming quiet) and start the wind-down before they tip into overtired territory. Keeping a calm, low-stimulation environment in the 30 minutes before sleep makes a real difference. Dim the lights, lower the noise, slow your own movements and voice.
A predictable bedtime routine is also key. It doesn't need to be long or complicated, just a consistent sequence that your baby comes to recognise as the pathway to sleep. And when they do fight it, try to stay calm yourself. Your energy is contagious. If you're tense and frustrated (which is completely understandable), your baby will pick up on that and it will make settling harder.
The Bedtime Guide covers all of this in detail, including how to read your baby's tired cues accurately, how to build a bedtime routine that works, how to troubleshoot when things fall apart, and how to support your baby through the transition from awake to asleep without any training, tears, or disconnect. It also includes guidance on settling with different caregivers, multi-child bedtimes, and what to do about false starts.
You're not doing anything wrong. Bedtime is hard sometimes, even when you're doing everything right. That's okay.
