What Is ADHD in Adults: A Guide to Symptoms and Diagnosis
What ADHD is in adults, in the words of the NHS, NICE, the WHO and the Royal College of Psychiatrists, and what each UK nation says about where to start.
27 December 2025·14 min read
Frequently asked questions
What are the main symptoms of ADHD in adults?
Adult ADHD symptoms include difficulty concentrating, poor time management, impulsivity, restlessness, trouble completing tasks, disorganisation, and emotional dysregulation. Symptoms often present differently than in children, with hyperactivity becoming more internal (racing thoughts, restlessness).
How is ADHD different in women?
ADHD in women often presents with more inattentive symptoms rather than hyperactivity. Women may experience emotional sensitivity, difficulty with organisation, chronic overwhelm, and internalised symptoms like anxiety. This leads to many women being diagnosed later in life.
Can ADHD symptoms change over time?
Yes, ADHD symptoms can change throughout life. Hyperactivity often decreases in adulthood while inattention may persist. Life transitions like starting university, new jobs, or parenthood can make symptoms more noticeable. Hormonal changes can also affect symptom severity.