Symptoms (observed by the patient)


  • Difficulty in focusing attention
  • Restlessness
  • Unfocused motor activity (fidgeting, twitching, tics)
  • Impulsive decision-making

For children to be diagnosed with ADHD, six or more symptoms should persist, for at least six months, to a degree that is inconsistent with the brain development corresponding to that age. For older adolescents and adults, five or more symptoms should persist.



Signs (observed in the patient)


ADHD patients are likely to:

  • Be unable to sustain attention during lectures, reading, taking notes, etc.
  • Be easily distracted by irrelevant thoughts or stimuli


  • Averse to tasks that need sustained mental effort, such as doing homework, completing forms, reviewing lengthy content, etc.
  • Disregard instructions and fail to complete schoolwork, chores, or duties in the workplace


  • Be forgetful in daily activities, such as chores, errands, making calls, and keeping appointments
  • Lose items such as school supplies, wallets, keys, paperwork, spectacles, and cell phone
  • Overlook or miss details, make careless mistakes in school, at work, or during other activities


  • Ignore and not listen when spoken to directly


  • Have problems organising work, sequencing priorities, keeping things in their suitable places, doing work without creating a mess, managing time, and meeting deadlines


  • Find it hard to be seated in the classroom or in the office
  • Be unable to play or engage in hobbies quietly


  • Run around when it is inappropriate to do so
  • Have trouble waiting for their turn


  • Fidget and squirm in their seats because of their hyperactivity
  • Be constantly in motion


  • Talk non-stop
  • Speak out an answer before the question has been completed, finish others’ sentences, or interrupt the flow of a conversation