"It's a basal cell carcinoma," Jackman, who was wearing a small bandage on his nose, told Ripa Thursday. "Everything's fine. It is skin cancer but the least dangerous form of it. So it's just something I have to get out.
"Being an Aussie with English parents, growing up in Australia, it's sort of the new normal for me."
He urged people to wear sunscreen and get regular checkups to avoid the same kinds of struggles.
"Our rule as kids growing up was that you get burned and peel two or three times then you're set. That was your base," Jackman said. "I mean, it was crazy."
He also said society seems more aware of the threats of skin cancer than they did when he was a child, rather than being focused on trivial rules that don't make a difference.
"You were not allowed in the pool within 30 minutes of eating. Do you remember that one?" Jackman, 48, said. "You will die. Nothing about sunscreen."
Jackman has previously taken to social media to talk about his struggle and raise awareness on the issue, and posted a photo just two weeks ago about this latest issue.
He said he's glad that his children's generation seems to be more willing to take care of their skin, and that wearing sunscreen is "cool" now, rather than being tanned.
"You can be your own skin," Jackman said. "I'm so happy for my kids. It's all changed."