Published May 9, 2026, 7:30 a.m. ET Dave Coulier is opening up about the health battle behind the noticeable changes fans have spotted in his appearance and voice. The Full House star posted a candid video to Instagram on Thursday after some followers commented that he looked thinner and sounded different than they remembered. “Hi everyone, it’s me, Dave, and I haven’t posted in quite a while and the last time I did some of you said that I look differently and I sound differently, and I do,” Coulier said. “And what you’re seeing is the side effects of extensive radiation that I went through for carcinoma in my throat.” The actor explained that the treatment has taken a major toll physically. Because he has been unable to eat solid food for several months, he said he has lost 45 pounds. The radiation has also affected his speech. “I haven’t been able to eat solid food in months, and so I’ve lost 45 pounds, that’s what you’re seeing,” he continued.…