Can ADHD run in families?

Yes — ADHD can and often does run in families. In fact, ADHD is one of the most strongly inherited conditions in psychiatry. Research shows that genetics account for a large part of why someone develops ADHD. Many families only realise this in hindsight. An adult may be diagnosed later in life and suddenly recognise similar lifelong patterns in parents, siblings, children, aunts, or uncles — such as chronic disorganisation, distractibility, emotional reactivity, procrastination, or difficulty following through, even if those relatives were never labelled as having ADHD. In previous generations especially, ADHD was often missed, particularly in people who were academically capable, quiet, or primarily inattentive rather than hyperactive. ADHD can also look different from person to person within the same family. One relative might be visibly restless and impulsive, while another struggles more with focus, overwhelm, or burnout. That said, genetics are not the whole story. Environment also matters. Stress, sleep, school or work demands, and coping strategies can influence how noticeable or impairing ADHD symptoms become at different stages of life.