Princess Bajrakitiyabha Mahidol, the eldest daughter of Thailand's King Maha Vajiralongkorn, has been hospitalized for more than three years after collapsing during a military dog training session in December 2022. The palace announced that her health has deteriorated, with reports of unstable vital signs, low blood pressure, and an abdominal infection affecting her large intestine. Medical devices continue to support her lung and kidney functions, and her condition has been described as 'uncontrollable' as it impacts other organs. Educated in the UK and the US, the 47-year-old princess has campaigned for women's rights and held various roles with the United Nations. Her health situation raises concerns about the future of the Thai monarchy, as she was seen as a potential successor to her father, the king. Thai royal expert Andrew MacGregor Marshall has indicated that her prognosis is grim and could lead to chaos within the royal family. The palace's last update on her health was in August 2025, and since then, there have been no further announcements regarding her condition.