King George III and his struggle with Mental Health

Historical and medical consensus now indicates that King George III suffered from bipolar disorder (Type I) with recurrent episodes of mania and psychosis, rather than the metabolic blood disease porphyria as previously thought. His severe, recurring mental health crises resulted in rambling speech, insomnia, extreme agitation, and delirium. Biploar I is considered the much more severe version of Bipolar often with varying degrees of psychosis.

For decades, historians supported a physical diagnosis called porphyria, famously proposed in the 1960s. However, modern medical re-evaluations—including computer-assisted language analysis of his handwritten letters—have debunked this theory. The analysis revealed characteristic manic features in his writing, such as sentences spanning hundreds of words, which correspond to the manic phase of bipolar disorder.

Timeline of his illness:

• First Episode (1765): A brief, early bout of cognitive impairment and depression.
• Severe Mania (1788): A major episode triggered a widespread Regency Crisis. The King suffered from hallucinations, nonstop gibberish, and violent mood swings, requiring physical restraint by his servants.
• Final Relapse (1810): Following the death of his youngest daughter, Princess Amelia, the King suffered a final breakdown from which he never recovered. He spent the last decade of his reign declared mentally unfit to rule, living in isolation at Windsor Castle until his death in 1820.

The most alarming effect of the King’s illness was his periods of mania. At their mildest George experienced a ‘a desire of talking that he was unable to control’. Often, he would talk for hours until he was hoarse and foaming at the mouth.  

Despite his kind nature, his illness caused the King to exhibit inappropriate and wild behavior. He was sometimes violent towards his staff and doctors, and on one occasion he was violent towards his wife Queen Charlotte.

The moment in which the doctors decided that George III needed prolonged treatments, was a dreadful meal with the Prince of Wales, during which the King berated him in front of Queen Charlotte and the Princesses. The evening ended with George III picking his son up and throwing him on the floor. 

Studying George III’s illness is made more complicated by the political situation surrounding the King’s treatment. For example, the Prince of Wales installed his own doctor in the King’s household.

  

If George was deemed incapacitated and unfit to rule, the Prince of Wales could make himself regent and effectively run the country in his father’s place; the Prince’s doctor was tasked with writing pessimistic reports of the King’s illness to increase the likelihood that the Prince could take over as regent. 

In addition to pessimistic reports of his illness George was treated cruelly. Willis and his sons’ treatment, known as the ‘Moral Method’, involved enacting control over the King through stern words and a system of punishment and reward. It was designed to break the King’s spirit and to turn his behavior from mania into what they saw as compliance.

 

The King was often confined in a strait waistcoat or bound to his bed. George bitterly referred to one piece of binding equipment – a chair with a strait waistcoat attached – as his ‘throne’. In contrast, the King could be rewarded for ‘good behaviour’ with access to his library or a visit from his family.  

We can never really know what caused George III’s illness, but we do know that the King suffered greatly, both physically and mentally.  

His cruel treatment at the hands of his doctors was painful, humiliating and frightening. During these periods, Queen Charlotte and the couple’s daughters endured agonising hours in their rooms at Kew, anxiously waiting for news. The Prince of Wales’ attempts to use his father’s illness to gain power caused his parents even more strain.

However, King George III did not suffer from his famous bouts of mental illness until after the American Revolution. While he was a staunch opponent of colonial independence, his erratic “madness” (now widely believed to be Bipolar Disorder Type I) only began manifesting severely in 1788, several years after the war ended.

The misconception that a “mad” king lost the American colonies was largely popularized by the colonists themselves and later dramatized in film and theater. The true timeline of his reign and mental health clarifies several historical myths:

The American Revolution (1775–1783)

• His State of Mind: During the Revolutionary War, George III was entirely of sound mind. He was heavily invested in the conflict, viewing the preservation of the British Empire as a sacred duty.
• The Policies: He firmly supported the acts of taxation (like the Stamp Act) and harsh measures to suppress the colonial uprisings, famously insisting that “blows must decide” whether the colonies submitted or became independent.
• The Loss: The humiliating defeat at Yorktown in 1781 devastated him to the point that he even considered abdicating the throne, but he was not considered mentally incapacitated at this point.

The Mental Illness (1788–1820)

• The First Episodes: King George III’s mental struggles began in the late 1780s. During his severe manic episodes, he experienced rapid speech, sleeplessness, confusion, and sometimes violently aggressive behavior.
• The Medical Mystery: For decades, historians believed he suffered from Porphyria, a rare physical blood disorder. However, modern analyses of his surviving letters and symptoms strongly point to Bipolar Disorder Type I with bouts of mania.
• Impact on Rule: Because his episodes were intermittent, he would often recover for periods of time and resume his duties. However, by 1810, his mental decline became permanent, and his son (the future George IV) had to take over as Prince Regent.

Much more than a simple story of ‘The Mad King’, George’s periods of mental and physical illness were as complex as the man himself – and had a huge impact on him, his family, and the nation.