Some symptoms of ADHD are described as inattention, difficulty in performing tasks, hyperactivity and impulsivity.

• Inattention: where a person often fails to give close attention to details or makes careless mistakes, often has difficulty sustaining attention in tasks, often does not seem to listen when spoken to directly, or often does not follow through on instructions.
• Tasks: Where a person often has difficulty organizing tasks and activities, often avoids, dislikes or is reluctant to engage in tasks that require sustained mental effort, often loses things necessary for tasks or activities, often easily gets distracted by extraneous stimuli, or is often forgetful in daily activities.
• Hyperactivity: Where a person often fidgets with hands or feet or squirms in seat, often feels restless, often has difficulty engaging in leisure activities quietly, or often talks excessively.
• Impulsivity: Where a person often blurts out answers before questions have been completed, or often interrupts or intrudes on others.

(It's not unusual for ADHD to be misdiagnosed as Bipolar Disorder. Read about that.)

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