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ADHD and anxiety are often confused, and for good reason. They share several features, they frequently occur together, and one can sometimes be mistaken for the other. Understanding the difference matters, because the right support depends on identifying what is actually going on. This guide explains how ADHD and anxiety differ, how they overlap, and why a proper assessment is so important.
How ADHD and anxiety differ
At their core, the two are different. ADHD is a developmental condition involving long-standing difficulties with attention regulation, impulsivity and, often, restlessness, with signs present since childhood. Anxiety is characterised by excessive worry, fear or apprehension that is hard to control. With ADHD, a wandering mind and restlessness often come from under-stimulation and difficulty sustaining attention on things that are not engaging. With anxiety, the same restlessness and poor concentration tend to come from worry and a sense of threat or dread.
Why they are so easily confused
Both conditions can cause trouble concentrating, restlessness, difficulty relaxing, racing thoughts, irritability and disturbed sleep. From the outside, and even from the inside, these can look very similar. This is part of why ADHD is sometimes missed and labelled as anxiety alone, especially in women, who more often have the quieter, inattentive presentation of ADHD.
They often occur together
It is also common to have both. Anxiety frequently co-exists with ADHD, and in some cases anxiety develops as a response to years of undiagnosed ADHD, for example from constantly worrying about missed deadlines, forgetfulness or letting people down. When that is the case, treating the anxiety alone may help a little, but it can leave the underlying ADHD unaddressed.
Why a proper assessment matters
A good ADHD assessment is designed to tell these conditions apart and to recognise when both are present. The clinician will look at your history since childhood, the pattern and triggers of your symptoms, and whether anxiety, low mood, sleep problems or other conditions might better explain what you are experiencing. This careful, whole-picture approach, in line with UK guidance such as NICE guideline NG87, is what separates a real assessment from a quick questionnaire. You can read more about the signs of ADHD in adults.
Getting clarity
If you are not sure whether you are dealing with ADHD, anxiety, or both, a professional assessment can help you understand the full picture and find the right support. You can book an online adult ADHD assessment from £189, carried out by GMC-registered doctors with a next-day written report.
Frequently asked questions
Can you have ADHD and anxiety at the same time?
Yes. The two commonly occur together, and a good assessment will consider whether one, the other, or both are present.
Could my anxiety actually be ADHD?
Sometimes anxiety is the more visible problem while undiagnosed ADHD sits underneath. Only a proper assessment can untangle this.
Will an assessment look at anxiety too?
A thorough ADHD assessment considers other explanations, including anxiety and depression, as part of reaching an accurate conclusion.
Want to understand what is really going on? Book your online ADHD assessment from £189 with a next-day written report.
This guide is for general information only and is not a substitute for individual medical advice. If you are struggling with anxiety or your mental health, speak to your GP or a qualified clinician. Last updated 2026.