Puberty in autistic children: a double transition

Autistic Mirror (outside view, role parent)

The body signal reaches her awareness late or in bursts, because interoception is calibrated differently in many autistic people. The insula, a brain region that integrates and relays body signals such as hunger, tiredness or tension, works with lower resolution. That means the signal is weaker, arrives later, or suddenly breaks through intensely, without the gradual build-up other people experience. Your daughter does not notice "I am slowly getting hungry", but suddenly "I am urgently at my limit now".

That this becomes harder right in puberty has its own mechanism. Hormonal changes in adolescence shift the baseline of sensory processing as a whole. The thresholds at which signals become conscious are not constant, they depend among other things on oestrogen and progesterone levels. When these levels fluctuate strongly, the reliability with which body signals arrive fluctuates too. What worked with some regularity at ten is now less stable, not because your daughter has become careless, but because the hormonal foundation her earlier perception strategies stood on is currently in motion.

On top of that, autistic awareness of one's own body is often closely linked with alexithymia. Alexithymia describes the difficulty of matching body states to a feeling word, so not only perceiving but also placing what happens in the body. When the signal already arrives weaker and is then hard to name, a gap opens: your daughter does not know she is exhausted, because the signal was neither clear enough nor did the category "exhaustion" clearly present itself. Only when the body tips into the extreme does it become impossible to miss.

Puberty sharpens this further through increased social and school demands. More masking, more complex social situations, higher expectations. That pulls away capacity that would otherwise be available for the already more demanding body perception. The signal is not only weaker, it also has less attention left that it could reach.

Autistic Mirror (outside view, role parent)

Behind "I don't know" there is usually no resistance and no defence, but a genuine neurological information gap.

Alexithymia describes exactly that: the difficulty of putting one's own inner states into words. This is not because your daughter feels nothing, but because of how the signal travels from body to language, or does not. The insula, an area of the brain that brings body signals together and interprets them, works with lower resolution in many autistic people. That means an inner state is present and changes behaviour, energy and reactions, but it does not land in awareness as a clear, nameable "I am sad" or "I am overwhelmed". It stays diffuse.

Then there is interoception, the perception of the body's own signals. Hunger, exhaustion, tension, a racing heart, a lump in the throat: in many autistic teenagers these signals arrive muted, delayed or only at the moment when they are already very intense. So your daughter may only notice that something is wrong when it is already a lot. And then the question "What's wrong?" is especially hard to answer, because the body is already in alarm mode but the verbal match is missing.

Puberty sharpens this, because hormonal fluctuations shift the baseline of body perception. A signal that was still somehow readable last year can now arrive in different hormonal noise, even harder to place, even harder to name. Alexithymia is not unusually more intense in this phase of life.

So what your daughter may be saying with "I don't know" is not "I don't want to answer", but literally: "There is something there, but I have no access to it." That is an honest answer to a question she currently has no answer to.

Autistic Mirror (outside view, role parent)

Puberty is a recalibration for every brain. For an autistic brain this recalibration runs on a foundation that already works differently, and that is exactly what doubles the load.

The first mechanism is neurological. Hormonal fluctuations directly change the baseline of sensory processing. That means stimuli your child used to cope with can suddenly cross the overload threshold, not because the stimuli get worse, but because internal filter capacity is shifted by hormonal influences. Sounds, textures, body sensations that used to be tolerable now hit a system that is simultaneously going through a fundamental biological restructuring. This is not a phase, it is a genuine extra effort at the processing level.

The second mechanism is social and hits autistic teenagers particularly hard: masking. In the teenage years social expectations become drastically more complex. Implicit hierarchies, group rules, tone of voice, glances, small talk as a relationship signal, all of it becomes more demanding at the same time. Masking is the automatic suppression of autistic reactions in social situations, running as a dual task alongside the actual content and permanently costing prefrontal capacity. What may still have been manageable before grows considerably in puberty, because the social distance to the neurotypical peer group gets larger, not because your child can do less, but because the demands rise.

Both overlap: the sensory system is less stable because of the hormonal changes, and at the same time the social cost of adaptation rises sharply. The brain's resting system, which normally mediates between outer focus and inner recovery, gets hardly any room for that anymore, because school, peers and the body are all placing new demands at once.

What outsiders read as typical puberty is therefore genuinely a double transition for an autistic child: the biological plus the social recalibration, and both are more costly for autistic processing than for neurotypical processing.