Former US President Joe Biden's cancer has spread to his bones and is causing him pain, his son Hunter Biden said in a new interview. Hunter Biden spoke about his father's health during an interview with BBC News on Friday. He became emotional while talking about the former president's condition. Hunter said the cancer had spread beyond the prostate and into his bones. He said the disease was also affecting other parts of his father's body. "The cancer has spread," Hunter said. He described the condition as very painful and difficult for his father. Joe Biden is 83. He was the oldest person to serve as president of the United States. His age was a major issue during his time in the White House. The former president's health also became a major topic during the 2024 election campaign. Concerns about his age and ability to serve grew after a debate with Donald Trump. Biden later ended his campaign for another term. Trump went on to win the election and became president. Joe Biden first announced his prostate cancer diagnosis in May 2025. His office said doctors found the cancer after he had been experiencing urinary symptoms. At the time, doctors said the cancer had a Gleason score of 9. That score placed the disease in Grade Group 5, which is the highest risk group for prostate cancer. The diagnosis came less than four months after Biden left the White House. His medical treatment has continued since the diagnosis. In September 2025, Biden also had surgery for skin cancer. The procedure used a method that removes thin layers of skin. Doctors continue removing layers until no cancer cells remain in the treated area. The former president later received radiation treatment for his prostate cancer. His office said in October 2025 that he had completed a round of radiation therapy. The treatment was part of his care for the aggressive form of prostate cancer. The latest comments from Hunter Biden offer a new view of his father's health. Hunter said it was very hard to watch his father deal with the disease. He spoke openly about the pain and limits caused by the cancer. The family has faced the diagnosis together. Former first lady Jill Biden previously spoke about Joe Biden's cancer diagnosis. In an interview in May, she said the news was a shock to the family. Jill said she clearly remembered the moment they learned about the cancer. She also said the cancer was not found while Joe Biden was serving as president. The timing of the diagnosis has led to continued questions about Biden's health during his presidency. Biden and his former White House advisers faced criticism over whether they had fully shared information about his health. Those concerns became stronger during the 2024 campaign. His public appearances and debate performance also increased questions about his age and fitness for office. Despite those concerns, Biden has remained active in public life since leaving the White House. He has continued to speak on political and social issues. Hunter Biden's latest comments come as his father continues to deal with advanced cancer. Prostate cancer can spread from the prostate to other parts of the body. When cancer spreads to the bones, it can cause pain and other serious problems. The Biden family has not announced a new detailed medical report beyond the information already shared publicly. For now, Hunter's comments provide the latest public account of the former president's condition. Joe Biden's cancer diagnosis has become a deeply personal issue for his family. His son's emotional comments show the serious impact the illness is having on those close to him. The former president continues to receive care as he faces the progression of the disease.