Behavior

When an Older Baby Cries for Hours: Decoding the 6–9 Month Crying Spells

Colic is long gone, so why is your 6–9 month old suddenly crying for hours? The usual culprits at this age, and a calm way to work through them.

August 31, 2026 3 min read By The ParentPod Team

The quick version

Long crying spells in an older baby usually aren’t colic (that fades by ~4 months) — look for a newer cause.
Top suspects at 6–9 months: teething, a developmental leap, separation anxiety, overtiredness, or getting sick.
Work through comfort basics first, then look for a pattern over a day or two.
Sudden, inconsolable, out-of-character crying with any illness signs deserves a call.

You made it through the newborn colic and the evening witching hour, and things had settled — and now your 6, 7, or 8-month-old is suddenly crying for hours again and you have no idea why. The good news: at this age, long crying spells almost always have a findable cause, unlike the mysterious colic of early infancy. Here’s how to work through the usual suspects calmly.

First, rule out the basics

Before hunting for a deeper cause, run the quick comfort checklist — it solves more than you’d expect. Hungry? Overdue for a nap? Wet or sore diaper? Too hot or cold? Just want to be held and moved? A methodical pass through the basics often ends the crying before you get to the trickier explanations.

The usual culprits at 6–9 months

Teething — those first teeth often push through in this window and can genuinely hurt, especially in the evening.
A developmental leap — new skills (sitting, crawling, object permanence) can scramble mood and sleep for a week or two.
Separation anxiety — around 8–9 months many babies suddenly panic when you leave the room.
Overtiredness — a dropped or short nap can snowball into an evening meltdown.
Getting sick — fussiness often shows up a day before other symptoms do.

Look for the pattern

One rough evening is just a rough evening. What helps is watching for a pattern over a day or two: Is it always late afternoon (overtired)? Only when you leave (separation anxiety)? Paired with drooling and chewing (teething)? Alongside a runny nose or warm forehead (illness)? The timing and the companions of the crying usually point at the cause better than the crying itself.

Separation anxiety is a milestone, not a setback

The 8–9 month panic when you leave is a sign your baby now understands you exist even when they can’t see you. Quick, cheerful goodbyes and lots of peekaboo help them learn you always come back.

Call your pediatrician if the crying comes with

A fever, especially in a baby who also seems unwell or won’t feed.
Vomiting, diarrhea, a rash, or pulling at an ear.
Inconsolable, high-pitched, or unusual crying that’s out of character.
Fewer wet diapers, unusual sleepiness, or trouble breathing.

Frequently asked questions

Can a 7-month-old still have colic?

True colic typically resolves by about 3–4 months. Long crying in an older baby usually has a different, findable cause — commonly teething, a developmental leap, separation anxiety, overtiredness, or illness.

Why does my baby cry every time I leave the room now?

Around 8–9 months, separation anxiety kicks in as babies grasp that you still exist when out of sight. It’s a normal developmental milestone. Short, upbeat goodbyes and peekaboo games help them learn you always return.

When is hours of crying an emergency?

Seek care if crying is inconsolable, high-pitched, or out of character, or comes with fever, vomiting, a rash, breathing trouble, fewer wet diapers, or unusual sleepiness. Trust your gut — you know your baby.

Put this into practice

Keep the plan with
the family timeline.

Log the day, share the timeline, and keep the next handoff clear.

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