
4 Overlapping Symptoms of ADHD and Autism

Attention-deficit/hyperactivity disorder (ADHD) and autism spectrum disorder (ASD) are behavior disorders that affect how a person thinks, acts, and interacts with others. ASD affects around one in every 31 children (just over 3.2%), while ADHD affects 15% of boys and 8% of girls.
At Memphis Neurology, we often meet families who are trying to understand the difference between ADHD and autism because certain aspects can look a lot alike. Let’s examine four of the most common overlapping symptoms.
1. Trouble with focus and attention
One of the main signs of ADHD is difficulty paying attention. People with ADHD may get distracted easily, forget instructions, or have a hard time finishing tasks.
Attention problems in autism often occur for a different reason. A person with autism might be so focused on one thing—like a special interest or routine—that it’s hard to pay attention to anything else. Or they might find certain sights, sounds, or smells so overwhelming that staying focused is difficult.
At Memphis Neurology, we help families understand why their child is having trouble with attention. Understanding the root cause enables us to recommend the right treatment.
2. Difficulty with social skills
Both ADHD and autism can make social situations challenging. A person with ADHD might interrupt others, speak without thinking, or have trouble waiting their turn. This isn’t because they don’t care about others; it’s usually because their brains move fast, and they may act before thinking things through.
Someone with autism might also struggle socially, but in a different way. They may have difficulty understanding social cues, like tone of voice or body language. They might not know how to start a conversation or join a group activity. This can make it tough to connect with peers.
Although the reasons behind these social struggles may differ, the results look similar. That’s why it's important to examine the whole picture, not just one or two symptoms.
3. Sensory issues
Many people with autism are highly sensitive to things like noise, bright lights, certain fabrics, or strong smells. These sensations can feel overwhelming or even painful. Some may cover their ears when they hear a siren or avoid wearing certain clothes because the fabric feels scratchy.
People with ADHD can also have sensory issues, although it’s less common. They might get annoyed or distracted by certain textures or noises, especially when trying to focus.
At Memphis Neurology, we listen closely when parents or patients talk about sensory issues. This can give us important clues about what’s happening and how to help.
4. Routines and repetitive behaviors
Children and adults with autism often like routines. They may follow the same schedule daily, repeat the same phrases, or line up toys in a specific way. These repetitive behaviors feel calming and safe.
People with ADHD are usually less focused on routines. However, they might show repetitive behaviors when bored or looking for stimulation. For example, they might constantly tap their pencil, bounce their leg, or fidget.
Again, the behaviors may look alike, but the reasons behind them are likely different. That’s why it’s important to have a complete evaluation with a specialist who understands both ADHD and autism.
What you should do if you see these signs
If you or your child shows signs that could be ADHD, autism, or both, the best first step is to talk to a medical provider who understands neurodevelopmental conditions. At Memphis Neurology, we specialize in helping families understand these complex symptoms.
People with either condition or both can lead whole, meaningful lives with the proper support and therapies such as applied behavior analysis (ABA). You don’t have to figure it all out on your own — we’re here to support you every step of the way. Whether you’re just starting to notice symptoms or you’ve long been searching for answers, we can help.
If you have questions about ADHD and autism or want to schedule an evaluation, give Memphis Neurology a call or get in touch via the online inquiry form.
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