Signs of Autism in Toddlers: When to Seek Help

As a parent, you know your child better than anyone. If something about your toddler’s development feels different, maybe they are not babbling like other kids their age, or they do not seem interested in playing with you, it is natural to wonder whether you should be concerned.

Autism spectrum disorder (ASD) can be reliably diagnosed as early as age 2, but many children show signs much earlier. Recognizing those signs and acting on your concerns is one of the most important things you can do for your child, because early intervention leads to better outcomes.

This guide covers the early signs of autism in toddlers, what to watch for at different stages, and what to do if you have concerns.

Early Signs by Age

Every child develops at their own pace, and having one or two of these signs does not necessarily mean your child has autism. However, a pattern of differences across several areas of development is worth discussing with your pediatrician.

12 to 18 Months

At this age, you might notice differences in how your child communicates and interacts with you:

Limited eye contact. Your child does not look at you regularly during interactions, feeding, or play
No pointing or gesturing. Most children begin pointing to objects they want or find interesting by 12 months. A child who does not point, wave, or use other gestures may be showing an early sign of autism
Not responding to their name. By 12 months, most children will consistently turn to look at you when you call their name
Limited babbling. By 12 months, most toddlers are babbling with a variety of sounds. Reduced or absent babbling can be a red flag
No shared enjoyment. Your child does not bring objects to show you or look at you to share a reaction (for example, looking at you and smiling after seeing something exciting)
Lack of imitation. Most toddlers begin copying simple actions like clapping or waving by this age

18 to 24 Months

As children approach their second birthday, the signs may become more noticeable:

Limited or no spoken words. By 18 months, most children use at least a few single words. By 24 months, most can combine two words together (like “want milk” or “more play”)
Loss of previously acquired skills. Some children with autism develop language or social skills and then lose them, a pattern called regression. Any loss of words, babbling, or social skills at any age is a reason to seek evaluation
Preference for playing alone. Your child consistently prefers to play by themselves and shows little interest in interacting with other children or adults
Unusual play patterns. Rather than playing with toys in typical ways (pushing a car, feeding a doll), your child may line up objects, spin wheels repeatedly, or focus on parts of a toy rather than the whole thing
Difficulty with changes in routine. Intense distress when daily routines change, even in small ways
Repetitive behaviors. Hand flapping, rocking, spinning, or repeating the same movement patterns

Social communication differences are among the most common early signs of autism. Watch for:

Limited joint attention. Joint attention is the ability to share focus with another person on an object or event. For example, if you point at an airplane, does your child follow your point and then look back at you? Children with autism often have difficulty with this back-and-forth exchange.
Flat or unusual facial expressions. Your child may not use facial expressions to communicate emotions, or their expressions may not match the situation
Difficulty understanding emotions. Your child may not respond to your emotional cues. For example, they may not look concerned when you express pain or sadness.
Limited back-and-forth interaction. Conversations (even nonverbal ones) involve a give-and-take rhythm. Your child may not engage in this exchange naturally.

Sensory Differences

Many children with autism experience sensory input differently than their peers. Early signs may include:

Over-sensitivity to sounds. Covering ears or becoming distressed by everyday sounds like a vacuum, blender, or hand dryer
Under-sensitivity to pain. Not reacting to bumps, falls, or temperature changes in the way you would expect
Unusual reactions to textures. Strong aversion to certain clothing textures, food textures, or being touched
Visual fascinations. Staring at lights, spinning objects, or moving their fingers in front of their eyes

Sensory differences alone do not indicate autism, but when combined with social communication differences and repetitive behaviors, they are an important part of the picture.

When to Talk to Your Pediatrician

If you notice any of the signs described above, talk to your pediatrician. You do not need to wait for a certain number of signs or a certain age. If your gut tells you something is different, that instinct is worth following.

The American Academy of Pediatrics (AAP) recommends that all children be screened for autism at their 18-month and 24-month well-child visits. This screening typically involves a brief questionnaire, such as the M-CHAT-R/F, that you fill out in the waiting room.

However, screening alone is not a diagnosis. If your child’s screening results suggest a concern, your pediatrician should refer you for a comprehensive developmental evaluation. You can also request an evaluation even if the screening does not flag a concern. Parent observations matter and are taken seriously by most clinicians.

What to Do If You Have Concerns

Taking action on your concerns is not overreacting. It is being proactive about your child’s development. Here are practical steps:

Document what you are seeing. Write down specific examples and when they occur. This information will be helpful for your pediatrician and any evaluating professionals.
Talk to your pediatrician. Share your observations directly. Ask for a referral to a developmental pediatrician, child psychologist, or diagnostic clinic if your child has not yet been evaluated.
Contact your state’s early intervention program. Children under 3 may qualify for services through the Early Intervention program (called Early Intervention in Colorado and Alabama’s Early Intervention System / AEIS in Alabama), regardless of diagnosis. You do not need a referral to request an evaluation through early intervention.
Do not wait to see if they grow out of it. While some children do catch up on developmental milestones, research consistently shows that early intervention leads to the best outcomes. Acting early never hurts.
Start exploring services. If your child receives a diagnosis, ABA therapy and other developmental services can begin. The earlier services start, the more your child benefits from the window of rapid brain development in early childhood.

Early Action Leads to Better Outcomes

Research shows that children who receive early intervention, particularly before age 3, make greater gains in communication, social skills, and adaptive behavior compared to those who start services later. This does not mean that starting later is ineffective. It means that every month matters, and the best time to act on your concerns is now.

If you are wondering whether your child’s development is on track, trust yourself enough to ask the question. Talk to your pediatrician, request a screening, and if needed, explore getting started with services that can support your child’s growth.

You are your child’s best advocate. Taking that first step, even when you are not sure, is exactly the right thing to do.