The History of ADHD: From “Lack of Attention” to Modern Diagnosis
Did TikTok invent ADHD? No. But if you’ve only heard people talk about it in the last few years, I can see why it might feel that way.
The words we use now are relatively new. The behaviours are not. More than two centuries before anyone could make a TikTok, doctors were writing about problems with attention. Later, they wrote about children who could not sit still, children who acted before they thought, and children who struggled at school. What they thought those behaviours meant changed repeatedly.
That is the story in this documentary. It is also why I wanted to make it. I was diagnosed as an adult, and the history made me ask a question: how many people spent years being described by their behaviour, without anyone asking what was happening underneath it?
The video follows the medical record from the eighteenth century to the present. This page gives you a way to explore that record at your own pace, check the sources, and separate what the evidence says from what we might be tempted to read into it.
A quick answer: when was ADHD first described?
There is no single birthday for ADHD. The modern diagnosis grew out of several different lines of observation. In 1775, the German physician Melchior Adam Weikard described a “lack of attention.” In 1798, the Scottish physician Alexander Crichton also wrote about difficulty sustaining attention. Neither man was using the diagnosis we use today. Their accounts are historical descriptions that resemble parts of what we now recognize, not retrospective diagnoses of their patients. [1, 2]
That distinction matters. If we insist that every restless child in an old medical book “had ADHD,” we turn history into a neat origin story it does not support. If we dismiss those records because the term did not exist yet, we miss something just as important: people noticed attention differences long before screens, social media, or the modern school day.
1775 and 1798: attention before the diagnosis
Weikard’s description focused on attention. Crichton examined how attention could be disturbed and how difficult it could be to hold it steady. Their language belongs to their time; neither account maps cleanly onto today’s diagnostic criteria. Still, they are useful evidence against the idea that difficulty with attention suddenly appeared in the twenty-first century. [1, 2]
This is one reason I resist the question “Is ADHD just a modern trend?” It compresses two very different things into one. Public conversation about ADHD can rise quickly. A name can change. Diagnostic rules can change. None of that proves the underlying experiences were invented at the same time.
1902: George Frederic Still and the problem with moral language
In 1902, British paediatrician George Frederic Still described children he believed had difficulties with behavioural control. Some of his observations included problems with attention and impulse control. His group of cases was broader than the group we would diagnose with ADHD today, so it would be wrong to give every child in those lectures a modern diagnosis. [2]
The language is uncomfortable. Still spoke of an “abnormal defect of moral control.” That tells us something about how behaviour was interpreted then. It does not tell us that a child was morally defective.
I think about the words children hear when adults see only the behaviour: lazy, careless, difficult, disruptive. A label can sound like an explanation while explaining almost nothing. The history does not let us claim that every child called those things had ADHD. It does ask us to be more careful before treating a struggle as a character flaw.
The early twentieth century: medicine looks for another explanation
Between 1917 and the late 1920s, encephalitis lethargica affected people in many countries. Clinicians observed behavioural changes in some children after illness. Those cases helped shape later thinking about attention, activity, and the brain. They do not establish that ADHD is caused by encephalitis or brain injury. The history of ideas and the cause of a condition are different questions. [2]
In 1932, Franz Kramer and Hans Pollnow described a hyperkinetic condition in children. Their account helped move the discussion toward a more defined pattern of behaviour, while still reflecting the concepts and limits of their era. [1, 2]
The terminology shifted over time. Some writers used ideas such as “minimal brain damage” or “minimal brain dysfunction.” Those historical labels should not be mistaken for a present-day explanation of every person with ADHD. One of the most revealing things about this history is how often medicine renamed what it was trying to understand.
1937: an unexpected observation
In 1937, psychiatrist Charles Bradley reported that Benzedrine, an amphetamine, improved school performance in some children in his care. He had given it while trying to address headaches and noticed an effect he had not set out to study. The response was not universal, and his work took place in a particular institutional setting. It was an observation that influenced later research, not a modern treatment recommendation drawn from this page. [3]
It is easy to turn this into a dramatic “one doctor discovered ADHD medication” moment. The real story is more interesting. Children, teachers, clinicians, and the circumstances of a study all matter. Bradley also viewed medication as only one possible part of support. His result did not instantly settle what the condition was, who had it, or how to help everyone.
1968 to 1994: the diagnosis keeps changing
The diagnostic manuals show how much the framework changed in a few decades. The 1968 DSM-II used “hyperkinetic reaction of childhood.” In 1980, DSM-III introduced attention deficit disorder, with and without hyperactivity. The 1987 revision used attention-deficit hyperactivity disorder. DSM-IV in 1994 described inattentive, hyperactive-impulsive, and combined subtypes. [2, 4]
Think about the child who was quiet, worked hard to keep up, and rarely caused trouble in class. A system that primarily notices visible hyperactivity may miss that child. Changing a diagnostic category does not automatically fix that problem, but the changes show clinicians looking beyond one narrow picture.
These editions also explain why people still say “ADD.” It was once an official term. Today, ADHD is the diagnostic name, including presentations where obvious hyperactivity is not the main feature. The everyday language has not caught up with every revision of the manual, and that is understandable.
2013 and beyond: adults enter the picture more clearly
The 2013 DSM-5 revisions made the criteria more applicable across the lifespan, including changes to the age-of-onset requirement and the number of symptoms required for adults. The word presentations replaced the older idea of fixed subtypes, recognizing that the way ADHD shows up can change over time. [5]
That matters if, like me, you reached adulthood before anyone connected the dots. An adult diagnosis is not proof that ADHD began in adulthood. Clinicians look for a history of symptoms beginning in childhood, while also considering how responsibilities, coping systems, and the surrounding environment may have affected what other people noticed. A person can have spent years compensating without anyone seeing the effort.
Girls and women can be missed, particularly when their difficulties do not resemble the disruptive-child stereotype. But there is no single “female ADHD” story, either. People differ. Some are visibly restless; others look composed while working very hard to stay organized. Some do both at different times. The point is to look at the person and the pattern, not just the stereotype. [5, 7]
What a diagnosis actually involves
A video or article can help you recognize a question. It cannot diagnose you. There is no single test for ADHD. A clinician considers symptoms, history, their effects in more than one setting, and other possible explanations. Sleep problems, anxiety, depression, and learning differences can produce overlapping difficulties and may also coexist with ADHD. [6]
That is why I wanted the documentary to do more than string together dates. The diagnostic label has changed, and our understanding is still developing. The people living inside those descriptions deserve more care than a checklist or a viral claim can give them.
So did TikTok invent ADHD?
No. Weikard wrote about attention in 1775. Still was lecturing in 1902. Kramer and Pollnow published in 1932. Bradley reported his observations in 1937. The DSM labels changed in 1968, 1980, 1987, 1994, and 2013. None of that happened on a phone. [1–5]
Social media can make a subject more visible, and visibility can bring both recognition and misinformation. The sensible response is to check the evidence, stay curious, and avoid assuming that every relatable symptom is a diagnosis. It is also to avoid telling someone their experience cannot be real because you only began hearing about it recently.
For me, a late diagnosis did not rewrite my childhood. It gave me a different way to understand parts of it. That is why this history matters. The names tell us what medicine was looking for at different moments. The gaps tell us whom it may have overlooked.
Watch the documentary above for the full story, including the actual historical materials and the shifts in language. Then follow the sources below. I would rather you check my work than take a polished timeline on faith.
Questions people ask about ADHD history
Was ADHD invented by TikTok?
No. Physicians described attention difficulties in the eighteenth century, and the medical terminology developed across the twentieth century. Social media has changed how people discuss ADHD; it did not create the experiences documented in those earlier records. [1, 2]
Did George Frederic Still discover ADHD in 1902?
Still described children with difficulties that included attention and impulse control, but his cases covered more than what we now call ADHD. It is more accurate to call his lectures part of the condition’s history than to diagnose all of his patients after the fact. [2]
Is ADD different from ADHD?
ADD was a name used in the 1980 DSM-III, including a form without hyperactivity. The diagnostic name changed to ADHD in 1987. People still use “ADD” informally, often when they mean a predominantly inattentive presentation of ADHD. [4, 5]
Can someone be diagnosed with ADHD as an adult?
Yes. ADHD can continue into adulthood and may not have been recognized in childhood. An assessment considers evidence of symptoms beginning in childhood, current difficulties, their effects in different settings, and other possible explanations. There is no single diagnostic test. [5, 6]
Related watching and reading
- Explore the Feeling Seen video library.
- Read Feeling Seen by a Machine.
- For diagnostic information: CDC: Diagnosing ADHD.
Sources
- Faraone SV et al. World Federation of ADHD International Consensus Statement, historical timeline and evidence summary.
- Lange KW et al. The history of attention deficit hyperactivity disorder, Attention Deficit and Hyperactivity Disorders (2010).
- Strohl MP. Bradley’s Benzedrine Studies on Children with Behavioral Disorders, Yale Journal of Biology and Medicine (2011).
- DSM diagnostic terminology history, research review of ADHD diagnosis and classification.
- American Psychiatric Association. Highlights of Changes from DSM-IV-TR to DSM-5, ADHD section.
- Centers for Disease Control and Prevention. Diagnosing ADHD and ADHD in adults.
- Young S et al. Females with ADHD: expert consensus statement, BMC Psychiatry (2020).