Autism or autism spectrum disorder (ASD) can manifest in various children as various symptoms. The normal diagnostic age is 2 years, but certain infants can be found at the age of about 5 years.

Three Main Symptoms of Autism

Below are the three main symptoms of autism to watch for in children with diagnosed autism:

  • Delayed Milestones
  • A socially awkward child
  • Communication problems, both verbal and nonverbal

Main Symptoms of Autism

Delayed Milestones:

At the predicted age, every child begins cooing, rolling over, babbling, laughing, pointing, and sitting up. These are referred to as “milestones.” And though each child develops at their own pace, you can see a pediatrician if:

  • By the age of six months, the child is unable to smile.
  • By the age of 9 months, the infant has no facial features.
  • By the age of 12 months, the child has stopped cooing and babble.
  • By the age of twelve months, no pointing or waving is permitted.
  • By the age of 16 months, the infant has not begun to speak.

Social Awkwardness:

If your child exhibits signs of social awkwardness, you should be worried.

  • Avoids eye contact while you feed him
  • Prefers to play by himself
  • Doesn’t respond when their name is called.
  • Doesn’t like being touched.
  • Prefers fixed schedules, and even a small alteration will cause them a great deal of distress.
  • Has a hard time understanding or expressing emotions.

Communication problems, both verbal and nonverbal:

  • They keep saying the same words over and over.
  • They speak in a simple tone with no gestures.
  • They are unable to recognise feelings (such as anger or sarcasm) in a conversation.
  • They have a rough time explaining what they want.

Other important Red Flags are:

The following are some other significant red flags:

Regression in milestones:

Whether your infant develops milestones as anticipated for his or her age, but then lacks them around the age of 12-18 months and begins laughing, cooing, pointing, and so on, this is a cause for alarm.


If your child displays repeated activities such as head flapping, eyelid twitching, twirling, flapping their paws, or running in circles, you can see a pediatrician right away.

Pica (an uncommon tendency to consume something that is not called food, such as mud, clay, ice, or hair), consuming only certain food styles, such as sweet or salty food, or only ‘yellow’ or a specific-colored food are examples of irregular eating activity.

Temper tantrums:

are common in children aged 2 to 5. The infant can be irritated to the point of hitting their head on the concrete. They can respond strangely to even the most innocuous smells and voices.


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