Signs of Autism in Toddlers: Early Red Flags Parents Should Know

What Is Autism Spectrum Disorder?

Autism is a neurodevelopmental condition that affects how a person communicates, interacts socially, and experiences the world. Signs can appear as early as 12–18 months, though many children are not diagnosed until later.

Early identification and intervention lead to significantly better outcomes. If you have concerns, trust your instincts and speak with your pediatrician.

Social & Communication Red Flags

• Limited or no eye contact by 12 months
• Not responding to their name by 12 months
• No pointing, waving, or showing objects to share interest by 12–15 months
• No single words by 16 months
• No two-word phrases by 24 months
• Loss of previously acquired language or social skills
• Prefers to play alone and doesn’t seek comfort from parents when upset

Behavioral & Sensory Signs

• Repetitive movements (hand-flapping, rocking, spinning)
• Intense focus on specific objects or topics
• Strong preference for routines and distress when routines change
• Unusual reactions to sounds, textures, lights, or smells
• Plays with toys in unusual ways (lining up, spinning wheels repeatedly)
• Walks on tiptoes frequently

When to Seek an Evaluation

What to Do If You’re Concerned

1. Talk to your pediatrician at the next well visit (or sooner)
2. Request a referral for developmental screening and early intervention evaluation
3. Contact your state’s early intervention program (free evaluation for children under 3)
4. Consider a hearing test to rule out hearing issues
5. Document your observations (videos can be very helpful)

Related: Speech Development Guide and Early Intervention Services

Frequently Asked Questions

Can my child have autism and still make eye contact?

Yes. Some autistic children make eye contact, especially with people they know well. Lack of consistent eye contact is just one possible sign.

Is it possible my child will “grow out of it”?

Autism is a lifelong neurodevelopmental condition. However, with early intervention, many children make significant progress in communication, social skills, and independence.