ADHD isn't just a childhood disorder — it affects people of all ages, often in different ways. You might have ADHD if you're consistently forgetful, easily distracted, struggle with follow-through, or find it hard to sit still or manage time. Some people experience emotional impulsivity, while others mainly struggle with disorganization or mental fog. ADHD symptoms are often misunderstood, so it's important to assess whether your challenges are consistent with the diagnostic criteria.
Recognizing the symptoms
ADHD presents differently in every individual. While some show the classic signs of hyperactivity, others — especially adults — experience more internal restlessness or chronic disorganization. Common symptoms include:
- Trouble focusing or maintaining attention
- Forgetting appointments or misplacing items
- Chronic procrastination or difficulty completing tasks
- Impulsivity — interrupting, overspending, or acting without thinking
- Restlessness or feeling mentally "on edge"
- Poor time management
- Emotional regulation difficulties
In adults, symptoms may be misattributed to stress, burnout, anxiety, or depression. That's why consulting an ADHD psychologist or therapist for ADHD can help clarify what's really going on.
What do the diagnostic criteria mean?
The Diagnostic and Statistical Manual of Mental Disorders (DSM-5) outlines specific criteria for diagnosing ADHD, separated into two categories: inattention and hyperactivity-impulsivity. To be diagnosed, a person must meet several symptoms from one or both categories, be impaired in multiple settings (like work, home, or school), and show a consistent pattern over at least six months.
In adults, the presentation may shift — hyperactivity might look more like internal restlessness, and impulsivity may show up as poor financial decisions or abrupt relationship changes.
Getting diagnosed
Diagnosis usually starts with a clinical interview. A licensed professional — such as a therapist specializing in ADHD, psychologist, or psychiatrist — will ask about your developmental history, current challenges, and functioning across environments.
Assessment tools may include:
- ADHD symptom checklists
- Behavioral rating scales (from self and others)
- Cognitive or executive functioning tests
- Screening for related conditions like anxiety or depression
Only a licensed clinician can make a formal diagnosis, and having a clear diagnosis is essential for accessing the right treatments, services, and accommodations.