Autism spectrum disorder, better known as autism or ASD, is a developmental disability. Most people and children with this condition experience problems with social interaction, communication, repetitive behaviors, and interests. This can cause problems in relationships. One must keep in mind that several signs of ASD appear during the first 12 to 18 months. Hence, parents must consult a healthcare professional when they notice the following early signs of autism in children. Development of peculiar interests When a child is in the early stages of autism, he or she may show behaviors or interests that seem unusual. For instance, the child may line up toys or other objects and get incredibly upset when the order is changed suddenly. Another example of this early sign is the child throwing tantrums when separated from an object, activity, or toy. Unusual movements Another sign seen early in children is problems with cognitive functioning. So, if a child is on the autism spectrum, it can affect their motor skills. This can cause the child to go around in circles, flap the hands and feet, and rock back and forth rapidly. Additionally, the child may also experience an increased response to certain sensory triggers such as strong smells, sights, and sounds.