Why Medieval Knights Went Mad After Tournaments
Born into medieval nobility, a boy could expect his family to decide his future for him: he would become a knight. The perks were real enough, with a horse, expensive armor and the chance to impress noble ladies. The catch was a career built on charging toward angry men carrying enormous wooden poles.
By the 12th century, tournaments had become hugely popular across Europe. Noblemen gathered to show off their courage, their fighting skills and their remarkable willingness to suffer unnecessary injuries. The earliest events were not neat jousts at all, but massive mock battles in which dozens of armored knights galloped across open fields, swinging weapons and trying to knock one another senseless.
Eventually the sport became more organized. Knights now met in jousts, charging directly at each other with wooden lances, aiming to break the lance on an opponent or throw him from his horse. The rewards were honor, prestige, perhaps some money, and the admiration of the crowd. The consequences could be devastating.
Picture the moment a lance strikes a helmet. The head snaps backward, and for several seconds everything blurs. The knight may have just suffered a concussion, but because the helmet is not visibly broken, everyone assumes he is fine.
Modern medicine understands that a sudden impact can make the brain move and deform inside the skull, damaging delicate tissue even without an obvious wound on the outside. In the Middle Ages, nobody could explain this. Friends congratulated the rider, family celebrated his courage, and someone suggested another tournament next month.
Admitting that your head hurt was embarrassing, and medieval masculinity had little patience for inconvenient symptoms. Over the years, a knight might endure dozens of violent collisions. Not every blow causes a concussion, but repeated impacts can raise the danger of lasting injury.
Here is the unfortunate part. A man could survive every tournament, collect impressive victories and become a celebrated warrior, while his brain took the equivalent of a blacksmith’s hammer over and over. Armor could be repaired by a village craftsman. A brain could not.
Inside the skull, the picture is not comforting. The brain is a soft, delicate organ cushioned by fluid and enclosed in hard bone, an arrangement that works well under normal circumstances. Two armored men charging at each other at speed are not normal circumstances.
When a lance hits a helmet, the head can accelerate or rotate violently, and brain tissue can be stretched and damaged. It is a little like shaking pudding inside a metal bucket, except the pudding controls memory, personality and the ability to remember where you left your horse. And the helmet might remain completely intact, with no blood and no visible wound.
The knight climbs down, stumbles slightly and announces that he is perfectly fine. In reality he may have a pounding headache, blurred vision, dizziness and no memory of the previous half minute. His fellow knights congratulate him anyway, since he has not died, which medieval medicine counted as an encouraging sign.
A concussion can temporarily disrupt normal brain function, and more serious injuries may cause bleeding, swelling or lasting neurological damage. Returning to competition before recovering can make matters worse. Yet there was no neurological examination, no brain scan and no physician advising weeks away from contact. Someone was more likely to offer wine and suggest getting back on the horse.
Over time, repeated head injuries may contribute to persistent problems with concentration, memory, mood and behavior. Not every knight developed such problems, and nobody can diagnose medieval competitors from tournament records alone. But the underlying physical danger was real.
The morning after another tournament, a knight might wake with a pounding head and a sore neck, unable to bear bright sunlight and unsure how he ended up on the ground. His servant explains that he fell from his horse, again. He insists he is healthy, though he has just asked the same question four times.
Modern doctors know that concussions need careful assessment and recovery. Symptoms can last days, weeks or sometimes far longer, and repeated injuries may raise the risk of persistent neurological trouble. A medieval physician would more likely examine the head for obvious wounds and recommend rest, herbal remedies or treatments based on balancing the bodily humors.
Meanwhile the knight might forget conversations, grow unusually irritable and find simple tasks harder to concentrate on. Relatives would notice he was quicker to anger or less patient with servants. Such symptoms can follow traumatic brain injury, though they can also have many other causes, and nobody around him made the connection.
His family might blame his temperament, exhaustion or a spiritual affliction. Nobody suggested that repeatedly smashing his head against another armored man might be a factor, so the tournaments went on. Researchers today are investigating how repeated head impacts may contribute to long-term neurological disease, including chronic traumatic encephalopathy, known as CTE. But not everyone exposed develops such conditions, and symptoms alone cannot establish that diagnosis.
The most famous tournament accident of the Tudor age happened to a king. In March 1524, Henry VIII was a 32-year-old monarch, tall, athletic, handsome and fiercely proud of his physical prowess. He loved tournaments, with their magnificent armor, expensive horses and cheering crowds, and he enjoyed showing that he was better than everyone else, which few were eager to dispute.
According to contemporary reports, Henry entered a joust without properly securing his helmet’s visor. His opponent, Charles Brandon, Duke of Suffolk, charged with his lance, and it struck the king’s helmet and splintered violently against the metal. For a terrifying moment, spectators feared the king of England had been killed.
Imagine being Charles Brandon at that instant, having possibly killed the king in a friendly sporting contest. Fortunately Henry survived. Contemporary accounts describe the lance striking his helmet and breaking apart, but they do not establish that he was concussed or lost consciousness.
Henry learned little from the scare. He kept taking part in dangerous physical pursuits, including tournaments where even carefully designed armor could not remove the risk. In 1536 he suffered another notorious jousting fall, reportedly with a horse coming down on top of him.
That later accident raises more troubling questions, because the energetic young king who had dazzled European courts eventually became a very different man. Some modern observers have wondered whether repeated head injuries played a part in that transformation. The evidence is uncertain, and Henry’s behavior has many other possible explanations.
The contrast is striking. When Henry took the throne in 1509 he was about 17, tall, energetic, educated and gifted at sport, with a taste for hunting, dancing, wrestling, tennis and above all jousting. Foreign ambassadors praised his looks and intelligence, and his court was filled with music, celebrations and magnificent tournaments.
As he aged, things changed. His marriage to Catherine of Aragon deteriorated, partly because she had not produced a surviving son, and Henry became obsessed with securing a male heir. His solution involved challenging the authority of the Pope, overturning England’s religious establishment and marrying someone else.
By the 1530s his court was a dangerous place. Former friends fell from favor and powerful advisers faced execution. Thomas More was executed in 1535, and Anne Boleyn, Henry’s second wife, in 1536.
His health declined too. He gained considerable weight, suffered painful leg ulcers and lost mobility, and the athlete who once dominated tournaments struggled with ordinary movement. Some researchers have suggested that earlier head injuries may have contributed to changes in his mood, judgment or behavior.
Another camp urges caution. Historians cannot establish that brain damage caused his cruelty or political ambition, and chronic pain, illness and personal circumstances offer alternative explanations. Henry was also capable of ruthlessness well before his worst documented injuries.
Modern medicine does recognize that traumatic brain injury can sometimes affect personality, emotional regulation, concentration and memory. A person may become unusually irritable, small frustrations may provoke disproportionate anger, and family members often notice changes before the patient does. Experiencing such symptoms as the absolute ruler of England would have been another matter, since nobody was likely to tell the king to calm down and take a nap.
Some writers have argued that Henry suffered cognitive difficulties after his tournament accidents. Reliable evidence of severe progressive memory loss, however, is limited, and his surviving correspondence and political activity show he could still make complex decisions. It is important not to confuse historical speculation with a medical diagnosis.
His physical decline, at least, is well documented. Chronic leg problems, including ulcers that grew harder to manage, would have disrupted sleep and worsened mood in even the most pleasant of men. Henry was not always a pleasant man, and his growing suspicion unfolded in a genuinely dangerous political climate of religious conflict, succession disputes, rival noble families and fears of rebellion.
Which brings researchers to a provocative idea: could England’s most notorious monarch have suffered from CTE? The condition is a neurodegenerative disease associated with repeated head impacts, found in some boxers, American football players and other athletes. It is linked to abnormal accumulations of a protein called tau in particular patterns within the brain.
The theory attracts attention because the story sounds familiar. A young athlete takes repeated violent blows, then shows troubling changes later in life. Henry’s documented accidents include the alarming lance strike of 1524 and the serious fall of 1536, and his later years were marked by suspicion, authoritarianism and illness.
The obstacle is that CTE currently requires examination of brain tissue after death for a definitive diagnosis, and Henry’s brain has never been examined. His symptoms are also not specific to CTE. Chronic pain, obesity, possible metabolic illness, political pressure and his existing personality could all have shaped his conduct.
Did repeated concussions contribute to his decline? Possibly. Did he definitely have CTE? Nobody knows. His story shows how hard it is to separate brain injury from personality, illness and circumstance.
For the knights themselves, retiring after a head injury was rarely an option. Tournaments were not simply entertainment but a way to earn money, win powerful connections and display military ability. Victory could bring valuable prizes, captured horses, expensive equipment and sometimes real wealth, while defeat could leave a man injured, humiliated and financially ruined.
A knight with headaches, dizziness and trouble concentrating would, by modern standards, be told to see a doctor and avoid further impacts. His companions told him to get back on the horse. Reputation was at stake, and noblewomen had already taken their seats.
There was also the matter of masculinity. Knightly culture prized bravery, endurance and the ability to bear pain without complaint, and a man who withdrew risked being called a coward. Cowardice could damage a reputation faster than a lance could damage a helmet.
The danger extended beyond obvious wounds. Repeated head impacts can produce neurological damage even when a person never loses consciousness, and taking another concussion before recovering from the last can complicate healing. Nobody in a tournament camp kept a medical record of previous collisions, and lords, families and creditors all expected results.
So knights competed year after year. Their bodies gathered scars and broken bones that never fully healed, and their trophies piled up. Somewhere beneath the magnificent helmet, a brain may have been quietly wondering whether becoming a monk would have been the wiser career.
When a knight did fall from his horse, strike his head and spend twenty minutes asking what year it was, a physician might finally be summoned. Medieval doctors were not wholly ignorant. They recognized that serious head injuries could cause unconsciousness, confusion, paralysis and sometimes death, and they had inherited knowledge from ancient Greek and Islamic scholars, including descriptions of skull fractures.
Trouble began when the physician tried to explain what was happening inside the head. Influential medical theory held that health depended on the balance of four humors: blood, phlegm, yellow bile and black bile. An angry patient might be blamed on yellow bile, a depressed one on black bile, so personality was treated as a set of internal liquids behaving like badly supervised employees.
Depending on the symptoms, a physician might recommend rest, dietary changes, herbal preparations or treatments meant to restore balance. Some practitioners also used bloodletting, which meant removing blood from a man who had just suffered a serious injury. For visible skull injuries, though, medieval surgeons sometimes performed surprisingly sophisticated procedures, examining fractures, removing bone fragments and occasionally using trepanation.
Those operations carried enormous risks without modern infection control or anesthesia, but not every treatment was foolish. Careful observation, wound management and rest could genuinely help some patients. Persistent changes in memory, judgment or personality were far harder to understand, and they were more likely to be read through moral or spiritual explanations than medical ones.
One famous figure sits uneasily at the center of this debate: Sir Thomas Malory, the knight who wrote Le Morte d’Arthur. Born around the start of the 15th century, he was probably a Warwickshire gentleman who served as a knight and became caught up in England’s unstable politics. In the 1450s he faced accusations of robbery, violent assaults and sexual violence, allegations recorded in legal proceedings rather than proof that each was true.
He was repeatedly imprisoned and reportedly escaped custody more than once. While in prison, he composed or compiled his retelling of the Arthurian legends, a work celebrating honor, justice and noble conduct. It is a contradiction that has fascinated readers for centuries.
Modern research on traumatic brain injury has identified possible consequences including impulsivity, aggression and impaired judgment, particularly when the frontal lobes are damaged. Some of those symptoms look superficially like behavior attributed to Malory. Could repeated violence or combat injuries have affected his brain?
There is no reliable historical evidence that Malory suffered repeated concussions or a neurological disorder. His criminal accusations cannot be treated as medical symptoms, and 15th-century England, torn by the Wars of the Roses, was already violent enough that political rivalries and personal disputes regularly turned into armed confrontations. You did not necessarily need brain damage to behave recklessly, and being an ambitious nobleman with several enemies could be quite sufficient.
The accusations themselves also deserve caution, since they were not always reliable in politically charged disputes. Even the identification of the Arthurian author with the Warwickshire knight, though widely accepted, is not completely beyond debate. A diagnosis would require evidence of significant head trauma, evidence of later neurological symptoms and some way of separating those symptoms from deliberate misconduct, and court records rarely offer that level of medical detail.
Still, the possible human cost of repeated head injury is real. A knight might return home physically recognizable while seeming a different man. He might be irritable, impulsive, forgetful or struggling to concentrate on managing his estate and obligations.
Not every injured person becomes aggressive, however. Some experience depression, fatigue, anxiety or withdrawal, and others recover without lasting difficulties. Medieval observers had little way to tell neurological symptoms from ordinary shifts in temperament, so relatives might call the knight melancholy, a physician might blame his humors, and a priest might recommend prayer.
Forgetting an important agreement with a neighboring lord could have serious consequences in a world where disputes could end with armed men outside the castle. Surviving accounts rarely give enough detail to diagnose individual knights, though. Changes in behavior could just as easily stem from chronic pain, psychological trauma, illness or difficult personal circumstances.
The parallel with modern contact sports is hard to miss. Imagine an American football player colliding with another athlete at full speed, his helmet absorbing part of the blow, while medical staff rush onto the field. Now imagine two armored men on horseback and, instead of trained professionals, a physician with a bucket of leeches.
Both settings can expose participants to repeated violent impacts that make the brain accelerate, decelerate or rotate inside the skull. The brain does not distinguish between a football helmet, a boxing glove and a wooden lance. A shattered lance could still send dangerous forces through the head, and a fall from a galloping horse added another chance of injury.
Modern researchers distinguish concussions, which involve recognizable symptoms, from subconcussive impacts, which may cause no obvious immediate problems. Repeated exposure to head impacts is being studied for a possible link to long-term neurological disease. But the exact risks depend on many factors, and not every impact causes permanent damage.
A medieval knight trained from youth, then competed in tournaments, exercises and battles for years. His head took repeated blows that nobody tracked, with no concussion protocol and no mandatory medical clearance. If he could stand, he was probably considered fit to continue.
No one can calculate how often medieval knights were concussed, because surviving records rarely describe injuries in medical detail. The physical mechanisms, however, are familiar to modern neurologists. Equipment and medical understanding have improved enormously, yet the underlying vulnerability has not changed, since the brain still prefers not to take part in high-speed collisions.
That leaves the problem of diagnosing historical figures. CTE has been identified in some former boxers and football players, and it involves abnormal tau deposits in particular regions of the brain that specialists recognize under a microscope. It cannot currently be definitively diagnosed in living people, and confirmation requires examining brain tissue after death. Even today, scientists are still working out how its pathology relates to symptoms in life.
Symptoms sometimes linked to brain injury, such as memory difficulties, irritability, depression and impulsivity, can also come from many other conditions. Chronic pain, poor sleep and psychological stress can produce similar problems, and a medieval king ran a kingdom while worrying about rebellions, foreign invasions and awkward relatives. So historians must separate documented injuries, possible medical consequences and pure speculation.
We can say that medieval tournaments exposed participants to dangerous head impacts. We can explain how repeated trauma sometimes damages the modern brain. We cannot confidently diagnose CTE in individuals whose neurological condition remains unknown, which is exactly why the mystery endures.
The tragedy is that knightly culture often rewarded the very behavior that exposed men to these risks. Knights were expected to fight, endure pain and return for the next tournament, because refusing could stain a reputation, and damaging the brain was apparently the more respectable option. Some warriors undoubtedly recovered, others suffered lasting consequences, and many left too little evidence for anyone to know what happened.
The story of Henry VIII shows how a celebrated athlete became a feared and ailing monarch, with brain injury as one possible factor among many. The story of Malory shows how a knight accused of serious crimes could write one of literature’s great celebrations of chivalry. Neither offers a reliable basis for diagnosing brain damage, yet both remind us that repeated head injuries carry dangers medieval physicians could only partly recognize.
Today’s sports fan, at least, can enjoy a match without wearing 40 kilograms of armor or inviting someone to hit his head with a wooden pole. The pillow is softer and the chance of concussion far lower. And no one needs to summon a physician with a bucket of leeches.
