The Oscar-nominated "X-Men" star wrote, "Deb said to get the mark on my nose checked. Boy, was she right! I had a basal cell carcinoma. Please don't be foolish like me. Get yourself checked. And USE sunscreen!!!"
Just last month, the busy star celebrated his 45th birthday with a star-studded bash and performance for 4,500 guests, which raised $1.85 million for the Motion Picture & Television Fund, which provides health care and other services to entertainment-industry workers and retirees.
MORE FROM WONDERWALL: