Early Signs of Autism in Toddlers: A Parent's Checklist
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Every parent watches their child's first smile, first word and first steps closely. Sometimes, a parent notices that their toddler is not responding to their name, avoids eye contact, or seems happiest playing alone. These can be early signs of autism in toddlers, and noticing them early is one of the most helpful things a parent can do.
This checklist explains the common early signs of autism by age, what they look like in everyday life, and what to do if you are concerned. It is not a diagnosis. Only a qualified professional can assess your child, but knowing what to look for helps you ask the right questions sooner.
Why early signs matter
Autism Spectrum Disorder (ASD) is a neurodevelopmental condition that affects how a child communicates, interacts with others and experiences the world. Signs often appear between 12 and 36 months, though some children show differences earlier and others later.
Noticing signs early means your child can be assessed sooner and begin the right support (such as speech therapy, occupational therapy and parent guidance) while their brain is developing fastest. Early support can make a real difference to communication, learning and daily life.
Every child develops at their own pace, so one sign on its own does not mean autism. What matters is a pattern of several signs, or a loss of skills your child once had.
Early signs of autism by age
Use this as a guide. If your child is not reaching several milestones for their age, speak to a doctor.
| Age | Signs to watch for |
|---|---|
| By 12 months | Little or no eye contact; does not respond to their name; rarely smiles back at you; no babbling; does not point, wave, or reach to be picked up. |
| By 18 months | No single words; does not point to show you things ("look at that"); does not look where you point; little interest in other people; limited pretend play. |
| By 24 months | No meaningful two-word phrases (e.g., "want milk"); repeats words or phrases instead of using them to communicate (echolalia); prefers to play alone; lines up toys rather than playing with them. |
| By 36 months | Difficulty with back-and-forth conversation; does not play pretend games or join other children; strong distress at small changes in routine; intense focus on one topic or object. |
| At any age | Loss of words, babbling, or social skills the child once had. Always seek advice promptly if this happens. |
Signs of autism in toddlers, by area
The signs below are the ones parents most often describe to our doctors at ND Care Nirogam.
1. Social interaction
- Avoids or makes very little eye contact
- Does not respond when you call their name, even though hearing is normal
- Prefers to be alone and shows little interest in other children
- Rarely shares enjoyment, such as bringing you a toy just to show you
- Does not copy actions like clapping or waving
2. Communication
- Delayed speech, or no words by 16–18 months
- Has trouble expressing needs, and may pull your hand towards what they want instead of pointing or asking
- Repeats words, phrases or lines from videos without using them to communicate
- Speaks in an unusual tone or rhythm
- Does not understand simple instructions for their age
3. Behaviour and play
- Repetitive movements such as hand-flapping, rocking or spinning
- Lines up toys or objects, or plays with parts of toys (like spinning wheels) rather than the whole toy
- Strong need for routine and big distress at small changes
- Intense interest in one object or topic
- Frequent meltdowns that are hard to calm
- Hyperactivity: excessive movement, restlessness and impulsivity, which is common in autism and also in ADHD
4. Sensory sensitivities
- Covers ears or becomes very upset at loud sounds such as a mixer, pressure cooker or traffic
- Bothered by bright lights, certain clothes, labels or textures
- Very selective eating, often based on texture or colour
- Seems not to notice pain, heat or cold
- Seeks sensory input, such as spinning, crashing into things, or touching everything
5. Sleep and attention
- Difficulty falling asleep or staying asleep
- Poor concentration, even on play activities they like
Red flags: when to see a doctor quickly
Speak to a paediatrician or developmental specialist without waiting if your child:
- Does not babble, point or gesture by 12 months
- Has no single words by 16 months
- Has no two-word phrases by 24 months
- Loses any speech, babbling or social skills at any age
These red flags do not confirm autism, but they mean your child should be assessed.
What to do if you notice early signs
- Write down what you see. Note the behaviours, when they happen and your child's age. Short phone videos can help the doctor a lot.
- Talk to your paediatrician. Ask for a developmental screening and share your notes.
- Get a formal assessment from a developmental paediatrician, child psychiatrist or child psychologist.
- Check hearing and vision to rule out other reasons for delayed speech or response.
- Start support early. You do not need to wait for a final diagnosis to begin speech therapy, occupational therapy or parent guidance if your child needs it.
- Look after yourself too. Caring for a young child with developmental differences is demanding. Ask for help and connect with other parents.
How ND Care Nirogam can help
At ND Care Nirogam, Dr. Navdeep Sharma and our panel doctors have over 20 years of experience in Ayurveda and psychology. When parents come to us worried about early signs, we offer:
- A free first consultation with our panel doctors to understand your child's development, behaviour, sleep, diet and health
- Therapy support: behavioural therapy, speech and occupational interventions, and psychotherapy, coordinated with any specialists your child already sees
- Ayurvedic care: a personalised diet (ahar) and lifestyle (vihar) plan, yoga routines, Panchakarma where suitable, and herbal support only where appropriate for your child's age
- Regular follow-ups in person or online
We always work alongside your child's paediatrician and therapists, never instead of them. We do not promise a cure. Our aim is to support your child's development and make daily life easier for the whole family.
Learn more: Best Autism Treatment in India · Ayurvedic Treatment for Autism
Frequently asked questions
At what age can autism be detected?
Signs are often visible between 12 and 24 months, and many children can be reliably assessed by around 2 years. Some signs may appear earlier. If you are concerned at any age, ask for an assessment.
Can a toddler show signs of autism and not have it?
Yes. Speech delay, shyness or strong preferences can happen for many reasons. That is why a professional assessment is important rather than relying on a single sign.
My child makes eye contact. Can they still be autistic?
Yes. Autism looks different in every child. Some autistic children make eye contact but have other differences in communication, play or sensory responses.
Are hyperactivity and autism the same?
No. Hyperactivity (excessive movement, restlessness and impulsivity) is common in both autism and ADHD, but they are different conditions. A specialist can help tell them apart, and some children have both.
Does screen time cause autism?
There is no evidence that screen time causes autism. However, limiting screens and increasing face-to-face play and talking is good for every toddler's language and social development.
What is the first step if I suspect autism?
Write down your observations, then speak to your paediatrician or book a consultation for a developmental assessment. Early support helps, so it is better to check than to wait.
