Fear of the dark in children most often appears between 18 months and 2 years, just as imagination develops and toddlers start anticipating what they cannot see. It is common, in most cases it fades on its own before the age of six, and the way parents respond affects how long it lasts. Taking the fear seriously without dramatising it, keeping the bedtime routine and avoiding overprotection are the three levers that emerge from the research we read.
This article covers the age it starts, what goes on in a two-year-old’s head, the responses that help and those that keep the fear going, and the signs that call for advice. It draws on a review published in 2014 by researchers at the Université de Genève (University of Geneva) in the journal Médecine & enfance, and on the Nemours KidsHealth page on childhood fears. We could not find an accessible French institutional source on this specific topic: we would rather say so than fill the gap.
At what age does fear of the dark appear in children?
Most often between 18 months and 2 years, according to the Geneva review. It ranks it among the most common fears of early childhood, alongside the fear of being left alone and the fear of animals. Before the age of one, a baby’s fears focus on immediate, concrete stimuli: a sudden noise, an unfamiliar face at around eight or nine months. Nemours describes the same progression: strangers at around 8-9 months, separation between 10 months and 2 years, then imaginary fears.
Fear of the dark marks a turning point. It is no longer about something that is there, but about what might be there. So it is a sign of a new ability, anticipation, far more than a sign of a problem. The Geneva authors note that most typical childhood fears fade by around six and are short-lived.
Why is a two-year-old afraid of the dark?
Three mechanisms combine. The first is imagination: at around two, children begin to pretend and make things up, and they cannot yet clearly tell what they imagine from what is real. Nemours puts it simply: the monsters they picture seem real to them. The pretend play that emerges at the same age is the other side of this ability.
The second is the loss of familiar landmarks. In the dark, familiar objects disappear and the sounds of the house take over. The third is separation: bedtime is when the child is left alone, and fear of the dark often blends with separation anxiety, which began much earlier.
Fear of the dark or night terrors: don’t mix them up
Fear of the dark shows itself at bedtime, when the child is awake, calling out, crying or refusing to stay alone. Night terrors happen in the middle of the night, during deep sleep, in a child who screams without really being awake and remembers nothing the next morning. The two do not call for the same response: our article on night terrors covers the latter in detail. A nightmare, finally, wakes the child, who can sometimes describe it; it can feed fear of the dark on the following evenings.
How to respond when a child is afraid of the dark
Take the fear seriously, without dramatising it
This is the key point of the Geneva review. Denying the fear (‘there’s nothing there, stop it’) does not make it go away and teaches the child that nobody is listening. Dramatising it (‘my poor darling’) confirms there is something to be afraid of. The right stance fits into one calm sentence: ‘you’re scared of the dark, I understand, you’re safe, I’m right next door’. Nemours recommends exactly this kind of simple reassurance for the youngest children, who do not yet have the words to describe what they feel.
Keep the bedtime routine
A short, steady sequence, always in the same order, gives the child landmarks that the dark cannot take away. Reading a story or singing together, as Nemours suggests, is part of that routine. Routines and rituals play their usual role here in emotional security. Bedtime reading has a double benefit: it soothes, and it lets you approach the dark through books.
Adapt the room, without turning it into a brightly lit living room
The Geneva researchers mention three simple adjustments: a night light, a door left ajar, or a room shared with a brother or sister. Choose a dim, warm night light and switch it off once the child is asleep; our guide to baby night lights sets out the criteria. Sharing a room, when it is possible, is an often underestimated support: our article on baby and an older sibling in the same room explains how to organise it.
Make friends with the dark during the day
Nemours recommends facing fears step by step, starting with the easiest, and praising the child at each step. With a toddler, this happens through play: a den under a blanket, a torch in a room with the shutters closed, a game of peekaboo with the light. The dark becomes a setting for play before it becomes the setting for bedtime. The study cited by the Geneva authors was based on this principle: the children dimmed the light themselves with a dimmer switch, one step at a time. All of them reached the target level within two weeks, with the benefit maintained for about a year. This study involved children aged 3 to 11; with a two-year-old, you keep the spirit of it, not the protocol.
Books about the dark
The Geneva researchers describe bibliotherapy as inexpensive and effective: stories in which a character goes through the dark and comes out fine. Read during the day first, then in the evening, they give the child words and a model. Choose picture books in which the dark ends up feeling familiar, not ones featuring monsters under the bed.
What keeps fear of the dark going
The Geneva review highlights overprotective responses: taking the child into the parents’ bed or going back again and again to reassure can keep the fear alive. Nemours gives the same warning using the word ‘accommodate’: organising life around the fear confirms to the child that it is justified. This does not mean leaving them to cry. It means responding, then going back to the usual framework: a brief presence, one sentence, and the light stays low.
Two other factors weigh in. Frightening images, first: Nemours recommends limiting scary films, cartoons and images, and at this age the threshold is low. Tiredness, second: an exhausted child is less able to manage their emotions, and bedtime becomes the moment when everything boils over. Regular sleep remains the foundation.
When to seek advice
Fear of the dark is normal. According to both sources, it warrants advice when it is intense or long-lasting and disrupts daily life. Nemours lists the warning signs: a fear that persists beyond the usual age, marked distress or frequent tantrums at bedtime. Add to these a child who can no longer sleep alone or separate from you, and tummy aches or headaches linked to the fear. Your child’s GP or paediatrician is the first person to talk to; the Geneva authors describe assessment tools and parent support programmes with good results.
Key takeaways
- Fear of the dark in children most often appears between 18 months and 2 years and fades before the age of six in most cases.
- It reflects a new ability, imagination, more than a problem.
- Take the fear seriously without dramatising it, keep the routine, make simple adjustments: dim night light, door ajar.
- Avoid what keeps it going: the parents’ bed, endless reassurance, frightening images, tiredness.
- Seek advice if the fear is intense, long-lasting, or stops the child sleeping alone.
Sources
- Eckmann Lévy N., Regusci-Theurillat A., Gentaz E., ‘La peur du noir chez les enfants’, Sciences cognitives section, Médecine & enfance, June 2014, Laboratoire du développement sensori-moteur, affectif et social, Université de Genève.
- Nemours KidsHealth, ‘Childhood Fears and Worries’, page reviewed in September 2023.
- The examples of daytime games and the choice of picture books reflect common practice, not an official recommendation.
