A rare public update after two years of silence

Princess Bajrakitiyabha Mahidol, the eldest daughter of King Maha Vajiralongkorn of Thailand, has developed a severe bloodstream infection, deepening concerns about her already fragile health.

The 46-year-old royal has been unconscious since December 2022, when she suffered a sudden heart condition during a military dog training session in Nakhon Ratchasima, about 250 kilometers north of Bangkok. Until now, the Thai palace had released almost no updates about her status, making this disclosure highly significant.

A statement from the Bureau of the Royal Household revealed that since August 9, 2025, doctors detected the infection and began administering antibiotics and medications to stabilize blood pressure, alongside continued lung and kidney support through medical devices.

Who is Princess Bajrakitiyabha?

Known affectionately in Thailand as “Princess Bha,” Bajrakitiyabha is the only child from King Vajiralongkorn’s first marriage.

Her background includes:

• Education: Studies in the United Kingdom, the United States, and Thailand.
• International work: Held various positions with the United Nations, focusing on human rights and criminal justice reform.
• Advocacy: Notably campaigned for better treatment of female prisoners, pushing for gender-sensitive prison policies.
• Royal duties: Appointed to a senior position in her father’s royal bodyguard command in 2021, just a year before her collapse.

These roles positioned her as a visible and active member of the Thai royal family, admired both domestically and internationally.

Why her condition matters to Thailand’s monarchy

Thailand’s monarchy is one of the most revered institutions in the country, and succession remains a sensitive issue. The king, 73, has seven children from four marriages but has not officially named his heir.

While Thailand’s royal succession rules traditionally favor male heirs, public speculation has long included Princess Bajrakitiyabha due to her senior royal duties, international presence, and close relationship with her father.

With her prolonged hospitalization, any potential role she could have played in the monarchy’s future is uncertain.

Medical Challenges: What is a Bloodstream Infection?

A severe bloodstream infection, also called sepsis, occurs when bacteria or other pathogens enter the blood, triggering an extreme immune response. This condition can cause:

• Sharp drops in blood pressure
• Organ failure (including kidneys and lungs, as in the princess’s case)
• Life-threatening complications if not treated promptly

Treatment typically involves aggressive antibiotics, intravenous fluids, and medications to stabilize blood pressure. In the princess’s situation, the infection adds another layer of complexity to an already delicate medical battle spanning more than two years.

Public communication under Thailand’s strict royal laws

Updates on the Thai royal family are tightly controlled. Thailand enforces strict lese-majeste laws, under which criticism—or even perceived disrespect—toward the monarchy can carry prison sentences of up to 15 years per offense.

This legal framework means information about royal health is rare and typically limited to official palace statements, as in this case. Independent commentary, speculation, or investigative reporting about royal matters is often avoided in Thai media.

What happens next?

The Bureau of the Royal Household stated that doctors will continue close monitoring of Princess Bajrakitiyabha’s condition, but stopped short of offering predictions about recovery or long-term prognosis.

Given the high level of public respect for the princess and the institution she represents, the palace’s next announcements—whenever they come—are likely to draw intense attention domestically and abroad.

Key takeaways

• Princess Bajrakitiyabha has been unconscious since December 2022 following a heart condition.
• Her recent severe bloodstream infection has worsened her health condition.
• She holds significant symbolic importance within the Thai royal family and succession context.
• The palace’s rare update breaks more than two years of near-total silence.
• Thailand’s strict lese-majeste laws heavily limit public discussion about the monarchy.