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ActNowASD
Most read20 min readReviewed August 2026

Before you accept that this is just autism, ask what hurts

Head-banging, hitting, and biting are often driven by pain, sensory overload, or unmet needs nobody has looked for. Rule out physical causes before a behaviour plan becomes the only story.

The short answer

  • Self-injury and aggression are strongly associated with gut problems, sensory sensitivity, poor sleep, and anxiety — not only with ‘behaviour for attention.’
  • Behaviour is communication. Ask what it achieves or signals, never what the child is doing to you.
  • Ask for a physical workup in writing before any behaviour plan is written as the primary response.
  • Track patterns for a week when the child cannot say where it hurts: time of day, meals, rooms, clothing, after school.

At 0 to 4, this usually looks like

Ages 0–4

At this age, pain almost always shows up as behaviour rather than words — ear pulling, head-banging against a cot rail, sudden fussiness at feeds, or a new refusal to lie flat. Ears, teething, reflux and constipation are the frequent, easily missed drivers behind a sudden change.

A pattern is more useful than a single incident: does the behaviour cluster around feeds, nap time, or a specific position? Bring the pediatrician a week of notes and the ten-question list rather than a general “he’s been fussy.”

  • Ear pulling, feed refusal, and sudden head-banging at this age are frequent, easily missed pain signals.
  • Action: bring a week of pattern notes to the pediatric visit, not a single incident.
  • Action: ask specifically about ears, teething, reflux and constipation.
  • Action: use the ten-question list rather than a general “is he in pain” question.

Changes when you change the age at the top of the page.

At 5 to 8, this usually looks like

Ages 5–8

Dental pain is among the most under-checked causes at this age, partly because children who cannot tolerate a standard dental exam are exactly the ones whose pain goes unfound. Constipation from holding it in all day at school is another common, quiet driver of after-school distress.

Ask for a dental visit with sensory accommodations rather than skipping checkups because exams are hard — a shorter visit, a familiar hygienist, or a desensitisation plan beats no visit at all.

  • Dental pain is among the most under-checked causes because exams themselves are often the barrier.
  • Action: ask for a dental visit with sensory accommodations rather than skipping checkups.
  • Action: request scheduled school toilet access to reduce all-day holding.
  • Action: note after-school behaviour patterns rather than treating each day as unrelated.

Changes when you change the age at the top of the page.

At 9 to 12, this usually looks like

Ages 9–12

Headaches, migraines, and for some children menstrual pain start to enter the picture around later primary, and anxiety can amplify how strongly pain shows up in behaviour. A “behavioural” explanation offered first, before any physical check, should be treated as incomplete rather than final.

Ask specifically about head, abdomen and period pain rather than a general “does anything hurt,” which often gets a no even when something does. Bring a pattern log if the behaviour has changed over weeks rather than days.

  • Headaches, migraines and, for some, menstrual pain start to matter more from this age.
  • Action: ask specifically about head, abdomen and period pain rather than a general question.
  • Action: treat a “behavioural” label offered before any physical check as incomplete.
  • Action: bring a written pattern log if the change has been building over weeks.

Changes when you change the age at the top of the page.

At 13 to 17, this usually looks like

Ages 13–17

By the teen years, it matters to distinguish regulation-related self-injury — a response to overload or pain that serves a sensory or coping function — from suicidal self-harm, which needs a different, more urgent pathway. Both deserve a serious response; neither deserves panic that shuts down honest conversation.

A calm, direct safety check works better than an alarmed reaction: ask plainly whether they want to be safe, whether they have thought about hurting themselves on purpose, and involve mental health support alongside — not instead of — a medical review for physical causes.

  • Regulation-related self-injury and suicidal self-harm need different pathways — both need a serious response.
  • Action: ask plainly and calmly whether they have thought about hurting themselves on purpose.
  • Action: pair medical review for physical causes with mental health support, not one instead of the other.
  • Action: involve a mental health professional the same day if there is any risk to safety.

Changes when you change the age at the top of the page.

The checks that get skippedHow often a physical cause is found when someone looks
Autistic children with a GI issue, ages 2–532%
Typically developing peers, same ages7%

Sotelo-Orozco & Hertz-Picciotto, 2024, CHARGE-study comparison, ages 2–5. Gut problems are frequently silent and show up as behaviour.

The ten-question list

Ask about each specifically — a general “are you in pain?” often gets a no even when something hurts:

  1. Ears
  2. Teeth / jaw
  3. Gut / constipation / reflux
  4. Sleep quality
  5. Skin / eczema / infection
  6. Headaches
  7. Urinary pain
  8. Menstrual pain (when relevant)
  9. Injury or limp
  10. New medication side effects

Dental pain is among the most under-checked, and children who cannot tolerate an exam are exactly the ones whose pain goes unfound. Ask for dental care with accommodations — see medical appointments.

Why “just autism” is a dangerous first answer

Autism can involve different pain expression and sensory processing. That does not mean injury, hitting, or head-banging should skip a medical look. Sudden change in behaviour is a clinical clue.

Gut problems are more common and often “silent” — they show up as behaviour. See gut.

Self-injury as communication

Head-banging, biting, hitting self or others can signal:

  • Pain
  • Sensory overload or need for input
  • Escape from an unbearable demand
  • Communication breakdown
  • Exhaustion after masking all day

The question is what it achieves or signals, not how to punish it out of existence. Safer sensory alternatives and environment change beat extinction-only plans — see sensory and meltdown.

Pattern log (one week)

Time What happened Before (food/sleep/school) After Suspected trigger

Bring the log to the doctor. Patterns beat guesswork.

What to say at the appointment

“The behaviour changed in the last six weeks. I want physical causes ruled out before we write a behaviour plan as the main response.”

That sentence reorders many visits. Ask for findings and next steps in writing.

When it is not (only) pain

Sometimes the driver is sensory load, a demand that became unbearable, a schedule change, anxiety, or sleep debt. Those are findable by watching and by school/home data — still start with medical red flags when change is sudden.

Seizures or lost skills need urgent medical attention — see seizures.

Safety while you investigate

  • Soften corners / supervise during high-risk moments
  • Do not leave a head-banging child alone mid-episode if injury risk is high
  • For teens, ask directly about wanting to die or hurt themselves; crisis paths are on teen mental health
  • Adult regulation first — your calm is part of the intervention

Same-day vs routine care

Seek urgent/emergency care for head injury, suspected fracture, inability to walk, breathing trouble, testicular pain, severe abdominal pain with vomiting, or suicidal self-harm.

Same-week medical review for new head-banging, biting that breaks skin, or behaviour change over days to weeks without explanation.

Write the change in one sentence for the triage nurse.

Working with school on pain-driven behaviour

Ask that behaviour plans wait until medical questions are addressed when onset is sudden. Share the pain log. Request nurse check-ins if headaches or stomach pain are reported.

Parent trap to avoid

Starting a restrictive behaviour programme the same week behaviour spiked without a medical look.

Questions parents ask after reading this

Use these with your co-parent, teacher, or clinician so the next conversation is concrete.

  1. What is the single highest-yield change we can make in the next seven days based on this page?
  2. What should we stop doing that is adding load without helping?
  3. Who else needs a one-page summary of this plan (school, caregiver, relative)?
  4. What would “a little better” look like in two weeks so we know the plan is working?

Write the answers down. Plans that live only in your head disappear on hard days.

If you only do three things

  1. Pick one action from this article and schedule it on the calendar (call, email, or routine change).
  2. Tell one other adult the plan in one sentence so you are not carrying it alone.
  3. Revisit this page after two weeks and note what changed — keep, adjust, or drop.

Small completed steps beat perfect unread plans. You are allowed to go slowly and still be a good parent.

Meltdown · Gut · Sleep · Sensory · Medical appointments

Questions parents ask

Written by · Reviewed by the ActNowASD editorial team · August 2026 · How we check numbers →

Where this comes from

This is health information, not medical advice. It cannot replace a conversation with your child's doctor.