A 3am guide

Why is my baby crying?

She's fed. She's changed. She's been winded. It's 3am and she is still crying — so what's left?

Here's the thing nobody tells you: at 3am you are not short of love or effort. You are short of information. You genuinely cannot remember whether the last feed was ninety minutes ago or three hours, whether she napped twice today or once, or whether this week is the one where everything goes sideways for a few days.

Work through it in order

Hunger — not just "did she eat", but when, and how that compares to her normal gap. Babies cluster-feed in the evening and during growth spurts; a feed two hours ago can genuinely be too long ago this week and fine the next.
Tiredness — the most missed cause by a mile. Count today's naps. If she's had one nap and it's late, you're holding an overtired baby, and overtired babies fight sleep harder, not less.
Nappy — obvious, quick, worth ruling out.
Too hot, too cold, something pinching — check the toes for a stray hair, honestly.
Development — in the weeks around a leap in skills, babies are fussier, wake more and need more contact. It passes.
Nothing at all — sometimes there is no reason. Crying peaks around 6–8 weeks and then genuinely fades. Holding a crying baby is not failing.

Always call your doctor if

Crying is inconsolable for hours or sounds like pain · a fever of 38°C (100.4°F) or higher in a baby under 3 months · trouble breathing · refusing to drink · very hard to wake. Trust your gut — a call is never wrong.

What CrySense does

CrySense is the part of Bloomie built for exactly this moment. It reads what you've already logged — the last feed, today's naps, the last nappy change, your baby's week — and lays out the likely reasons in order, in plain English. No microphone. Nothing leaves your phone. It is never a diagnosis; it's the information you can't hold in your head at 3am.

So instead of guessing, you get: "Last feed was 3h 0m ago — her usual gap this week is about 3h." Or: "One nap today — overtired is likely." Then you decide, because you know her best.

Let CrySense check what you've already logged

Recent feeds, today's naps, nappies and your baby's week — placed in a useful order when your own brain is exhausted.

Try CrySense in Bloomie

Bloomie provides general information based on CDC and AAP guidance. It is not medical advice and never a diagnosis.