ADHD symptoms
ADHD symptoms fall into two groups — inattention and hyperactivity-impulsivity — and combine differently in each person. Recognizing them is the first step, but only a qualified professional can make a diagnosis. This list helps you understand what to look for and when an assessment makes sense.
The two symptom clusters
Inattention
- •Difficulty sustaining attention on tasks
- •Careless mistakes and missed details
- •Not seeming to listen when spoken to
- •Trouble organizing tasks and time
- •Avoiding tasks that require sustained effort
- •Losing things and being easily distracted
- •Forgetfulness in daily activities
Hyperactivity & impulsivity
- •Fidgeting, tapping or an inability to sit still
- •Feeling restless or "driven by a motor"
- •Talking excessively
- •Blurting out answers before questions are finished
- •Difficulty waiting for one's turn
- •Interrupting or intruding on others
- •Acting impulsively without thinking ahead
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Try for freeFrequently asked questions
What are the three types of ADHD?
ADHD is classified into three presentations: predominantly inattentive (formerly "ADD"), predominantly hyperactive-impulsive, and combined, which includes both symptom clusters. The combined type is the most common.
How many symptoms are needed for a diagnosis?
In adults, generally five or more symptoms in a category, present for at least six months, appearing before age 12, occurring in more than one setting and causing real impairment. Only a qualified professional can make the diagnosis.
Can you have ADHD without hyperactivity?
Yes. The inattentive presentation involves little or no visible hyperactivity. It is common in women and adults and is often overlooked precisely because the person is quiet rather than disruptive.
Are ADHD symptoms always present?
Symptoms fluctuate with interest, stress and structure. People with ADHD can hyperfocus intensely on engaging activities while struggling badly with boring or repetitive ones — this variability is part of the condition, not a lack of effort.