How do I explain autism to my other child?

To explain autism to a sibling, use the child's own age as the guide and start with what they've already noticed. A working opening: "You've seen that your brother/sister does some things differently — they cover their ears when it's loud, they use fewer words, they need the same routine. That's called autism. It means their brain works in a way that has a name. It doesn't mean they love you less, and it doesn't mean anything is wrong." Special Learning has free plain-language material families can read alongside a sibling.

What do I say to a 4- to 7-year-old sibling?

Short sentences and concrete examples. "Your brother's brain notices sounds more than yours does — that's why loud places bother him. It's called autism. It's a word for how his brain works. You didn't do anything to make it happen and neither did he." Follow with one small thing they can do: "When we're at the store, holding his hand helps him a lot. That's something you're good at."

What do I say to an 8- to 12-year-old sibling?

This age wants the real explanation and the fairness questions. Give the plain definition, then leave room for their real questions: "Autism is how his brain is wired. It's not a sickness, and he's not going to grow out of it — but he's going to keep learning, the same way you're." Then ask: "What have you been wondering about that you haven't asked?" Wait. The Sibshops research (Meyer & Vadasy) is clear that siblings this age carry unspoken questions for years if no one invites them out loud.

What do I say to a teenage sibling?

Straight, adult conversation. Acknowledge what they've carried — being the flexible one, being the one who explains at school, sometimes wishing family life were different. Then give them agency: "I need you to know two things. One, you get to be a kid, not a co-parent. Two, if you ever want to know more about autism from someone other than us, I will help you find it."

What questions are siblings quietly asking but not saying out loud?

Field-standard research (Meyer & Vadasy's Sibshops workbook; Milevsky et al. 2005) documents that siblings routinely wonder: Am I going to get it too? Is it my fault? Will my brother/sister ever be able to live on their own? Do my parents love them more? Am I allowed to be angry sometimes? Invite these. Answer honestly — "no," "no," "we don't know yet, and we'll figure it out," "no," and "yes."

How do I make sure the sibling doesn't feel invisible?

One-on-one time. Not much — even twenty minutes a week that's just theirs, without their sibling in the room, is enough. Ask about their day, their friends, the things that have nothing to do with autism. That protects the relationship you've with them and the one they'll have with their sibling for life.

• Have one short, age-matched conversation with your other child.
• Ask them the question they've been holding: "What have you been wondering?"
• Schedule twenty minutes of one-on-one time this week — just theirs.
• Correct any "it's your job to help them" pressure they may be carrying.
• Download the free ABCs of Autism guide to read together if they want more.

Prefer to start with one guide? Download the free ABCs of Autism guide →

Next: how to explain to family after diagnosis

• Meyer, D. & Vadasy, P. (2008), Sibshops: Workshops for Siblings of Children with Special Needs, 2nd ed., Brookes Publishing.
• Milevsky, A. et al. (2005), "Sibling Relationships and Parenting," Journal of Family Studies.
• CDC, "Data and Statistics on Autism" (2023) https://www.cdc.gov/ncbddd/autism/data.html

Last updated 2026-07-11. This page is general information, not medical advice. Talk with your child's clinician about your specific situation.