Dave Coulier Opens Up About Physical Changes During Cancer Treatment

Dave Coulier has offered an explanation for the physical changes fans have noticed in his recent appearances.

The 55-year-old actor took to Instagram on Thursday to discuss his weight loss and altered voice, attributing both to his ongoing cancer treatment. In the video, Coulier noted that his absence from social media had prompted concerns from followers about his appearance.

"What you are seeing is the side effect of the extensive radiation that I went through for carcinoma in my throat, and I haven't been able to eat solid food in months," Coulier explained in the clip. He revealed that he has lost 45 pounds during his radiation treatments, which has also impacted his ability to speak clearly.

"Some of you said that I sound differently. So yeah, you're right on with what you're seeing and what you're hearing," he said, acknowledging the observations.

The Full House alum shared encouraging developments on the treatment front. His hair is beginning to grow back following chemotherapy he underwent in 2025 for lymphoma, and recent PET scans have delivered positive news.

"We got our PET scans back and the prognosis looks good for both the carcinoma in my throat and the lymphoma," Coulier stated. "So, we're very pleased with all of that."

Coulier was initially diagnosed with stage 3 Non-Hodgkin Lymphoma in November 2024. He later confirmed in March 2025 that a biopsy revealed he was cancer-free, five months after his diagnosis. In December 2025, doctors discovered P16 squamous carcinoma in his tongue, requiring radiation therapy. By February of this year, Coulier announced he had achieved remission from both cancers.