Earworms are a normal quirk of musical memory, not a symptom
An earworm is the experience of a catchy tune replaying in your mind when you didn't deliberately call it up; researchers call this involuntary musical imagery [1]. Work on the topic asks why particular tunes get stuck, how exposure and memory contribute, and how people might manage the experience — questions that apply to people in general rather than to any diagnostic group [1]. A separate line of theorizing notes that most earworm research describes the symptoms of the phenomenon, and that the deeper question of why music in particular gets stuck — as opposed to, say, language or poetry — is still unresolved [2].
That framing matters for the autism question. If earworms were an autism trait, you would expect the core literature to be organized around autism. It isn't: the neurological and behavioral reviews of earworms describe a broad human phenomenon and do not include autistic participants as a study group [1], and theoretical work on why songs get stuck likewise focuses on the mechanisms of induction rather than on autism [2].
The one study that actually checked autism found it was just one variable among many
The closest direct evidence comes from a study of involuntary verbal imagery — earworms of words rather than tunes — that correlated how often people experience them with a set of other factors. Autism was on that list, alongside long formal music training, literacy difficulties, and mental health disorders [4]. The abstract reports the correlation approach and the variables but does not state that autism emerged as a meaningful predictor, so it would be overreading it to say the study found an autism link in either direction [4].
Note also the scope: this study looked at verbal earworms, not musical ones, so even a clear result there would not automatically transfer to the familiar stuck-song experience [4]. As it stands, the honest reading is that autism has been examined as a candidate factor at least once, and the supplied evidence does not report a finding that earworms are more common or more intense in autistic people.
Why the idea feels plausible even without support
Earworms can be genuinely disruptive. One account describes them on a spectrum from minor irritation to something experienced as a kind of possession, where the repeated rhythm overwhelms a person's sense of their own internal rhythm and can interfere with sleep, work, or thinking [3]. That description is about the intensity of the experience, not about autism, and the paper does not discuss autism at all [3]. But it helps explain the intuition: if someone finds earworms overwhelming, it is natural to wonder whether a neurodevelopmental difference is behind it.
A related paper on autism looks at "exposure anxiety" — self-protection responses in autistic people and others — but it does not provide evidence about earworms or involuntary musical imagery [5]. So it can't be used to connect the two, even though it is sometimes the kind of autism-focused work people reach for when making that link.
What this means if you or someone you know gets stuck songs
Treat earworms as an ordinary feature of how musical memory works rather than as a sign of autism [1][2]. If the experience is severe — persistent enough to disrupt sleep or concentration — that is worth discussing on its own terms, as a problem of intrusive imagery, rather than as evidence of an autism diagnosis [3]. And if you are autistic and get frequent earworms, the current evidence neither confirms nor rules out that autism shapes the experience; the question has simply not been settled by the research supplied here [4].
Sources used in this answer
THE BEHAVIOURAL AND SYSTEM NEUROSCIENCE OF THE EARWORMS
Reviews the neurological and behavioral mechanisms of earworms (involuntary musical imagery) in the general population and does not include autistic participants, so it does not address autism.
Why do Songs get “Stuck in our Heads”? Towards a Theory for Explaining Earworms
Argues that earworm research has focused on symptoms rather than underlying causes and proposes theoretical directions for explaining why songs get stuck, without addressing autism.
Earworms and the Sound of a Self
Describes earworms as ranging from minor irritation to an overwhelming experience that can disrupt a person's sense of personal rhythm, sleep, work, and thinking, without discussing autism.
We are the knights who say 'ni'! New findings on involuntary verbal imagery
Correlated the frequency of verbal earworms with several factors including autism, music training, literacy difficulties, and mental health disorders, but the abstract does not report a specific autism result.
Exposure anxiety-The invisible cage: An exploration of self-protection responses in the autism spectrum and beyond
Explores exposure anxiety and self-protection responses in autistic people and others but provides no evidence about earworms or involuntary musical imagery.
