The biggest symptom of autism is difficulty with social interaction and communication. People with autism often struggle to understand and interpret social cues, such as facial expressions, body language, and tone of voice. As a result, people with autism may appear aloof or uninterested in social interaction, or they may have difficulty interpreting and responding to social situations.
People with autism may also have difficulty expressing themselves verbally, either by speaking or writing. They may have difficulty initiating conversations, and when they do speak, they may struggle to convey their thoughts and feelings. They may also have difficulty understanding jokes or sarcasm, and may take things literally.
In addition to communication and social issues, people with autism may also be hypersensitive to certain sounds, smells, tastes, and textures, as well as being over- or under-sensitive to physical touch. They may also struggle with repetitive behaviors, such as rocking, spinning, or hand-flapping, as well as difficulty with transitions and changes in routine.
Overall, difficulty with social interaction and communication are the most common symptoms of autism, and are often the most difficult to manage. With the right support and intervention, however, people with autism can learn to manage their symptoms and lead fulfilling lives.