Dave Coulier thought he had “a bit of a cold” before the cancer diagnosis became “overwhelming”.

Dave Coulier was surprised when what he thought was a mild cold turned out to be stage 3 non-Hodgkin's lymphoma.

“I went from 'I have a mild cold' to 'I have cancer' and it was pretty overwhelming,” the “Full House” alum, 65, said in an interview with People published Wednesday.

“It was a really fast roller coaster ride.”

Coulier's main symptom leading up to his diagnosis was swelling of his lymph nodes. Other patients may also experience chest pain or fever, according to the Mayo Clinic.

Three days after learning he had cancer, the comedian was informed about the guy and was told he was “aggressive.”

However, after his bone marrow test came back negative, he received more positive news as the likelihood of his cancer being curable fell from “low” to “90 percent.”

Now that it's been a few weeks since his illness, Coulier admitted he has his “good days” and “bad days.”

“Some days I feel nauseous and dizzy, and other days the steroids kick in and I feel like I have a lot of energy,” he said on a special episode of his podcast “Full House Rewind” on Wednesday.

“I won't try to hide anything. I would rather talk about it, open the discussion and inspire people.”

Coulier has a family history of the disease, indicating that his mother, sister and niece died of breast cancer.

However, the popular sitcom star shared that seeing what the women in his life had been through helped him find the courage to be “as strong as they were.”

“I don't know how to explain it, but there was an inner calm through all of this, and I think that's part of what I experienced with the women in my family,” Coulier said.

“They really instilled that in me and inspired me in a way because they were great at what they went through, and I was just like, 'I'm okay with that too.'”

He added: “I've had an incredible life on a journey with incredible people around me and I'm doing well. It definitely changes your perspective.”

Earlier Wednesday, Coulier spoke about his diagnosis for the first time on the “Today” show.

In a moment of introspection, he told host Hoda Kotb: “I agree with the news [is] will be, no matter how devastating.”

He reiterated: “I have had an incredible life. I had the greatest people in my life. This has been an extraordinary journey and I have no problem if this is the end of the journey.”

The comedian first rose to fame as Joey Gladstone on “Full House” from 1987 to 1995. He then reprized his role for five seasons on “Fuller House.”

In January 2022, his co-star Bob Saget died at the age of 65 from a cerebral hemorrhage after hitting his head.

Coulier honored his long-time friend at the time and wrote about X: “My heart is broken. I love you, Bob. Your forever brother, Dave.”