My 3.5-year-old isn't sleeping well — should I worry?

When bedtime turns into a nightly battle and the nights feel broken, your worry is real — and it deserves a clear, calm answer.

In short

At 3.5 years, broken sleep is very common and almost always settles with the right routine and a few gentle changes — it is rarely a sign of anything serious on its own. Most three-year-olds need roughly 10–13 hours of sleep in 24 hours, including a possible nap, and bedtime resistance, night waking and early rising are all part of the normal range at this age. What matters is the pattern: occasional rough nights are expected, but sleep that is persistently disrupted for weeks — and is also affecting your child's mood, attention or daytime function — is worth a closer look.

What's usually going on

At this age, sleep is shaped by routine far more than by anything medical. Common, fixable culprits include:

• An inconsistent bedtime or a wind-down that is too short or too stimulating
• Screens close to bedtime — light and excitement push sleep later
• A nap that is too long or too late, leaving little sleep pressure at night
• Big feelings — separation worry, new sibling, starting playschool
• Environment — too bright, too warm, too noisy

Try a steady, calming routine: same bedtime each night, a warm bath, dim lights, two or three quiet books, no screens for an hour before bed. Most families see real improvement within two to three weeks of consistency.

When to check with someone

Speak to your paediatrician if your child snores loudly, gasps or stops breathing during sleep, if night terrors or waking are frequent and distressing, or if poor sleep is clearly dragging on daytime mood, behaviour or learning. Sleep that is tangled up with delayed speech, limited social connection or unusual sensory responses is also worth a broader developmental check — not because something is wrong, but because clarity helps.

The Pinnacle way

A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care — never from an online form or an app. If your worry about sleep at 3y6m sits alongside other developmental questions, a structured developmental check gives you a calm, clear baseline. Our occupational therapy team can also help with the sensory and routine pieces of sleep when they're part of the picture.

Trusted sources

American Academy of Pediatrics guidance on recommended sleep durations for young children; CDC guidance on healthy childhood sleep habits and routines.

Next step — Try two weeks of a steady bedtime routine first; if broken sleep persists or worries you, book a developmental check with a Pinnacle clinician.

This is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.