Nick Cannon opens up about his rare form of lupus on 'GMA'

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Nick Cannon has been through quite a bit since he was hospitalized for kidney problems while on vacation with his family in Aspen, Colo. in January. Now the multi-hyphenate is speaking out about his recent diagnosis and the lifestyle changes he's making as a result.

"The technical term is lupus nephritis," the "America's Got Talent" host says in a new interview on "Good Morning America." "It's a rare form of lupus that's just attacking my kidneys. They thought it was just kidney disease and then they were trying to figure out why my immune system was attacking my kidneys and that was sort of the root of it all."

After a relapse led to another hospitalization and the discovery that he had blood clots in his lungs, which caused him to take another look at his priorities. "My kidneys were in tip-top shape but I started to feel pain again," Cannon says. "And because of my schedule and everything I had a few blood clots in my lungs which then affected my heart as well. A lot of people have passed away from that and the doctor said luckily I was in such great shape and taking care of myself because a lot of people have been taken down by it."

Cannon, who is also chairman of the TeenNick network, decided to step down as host of his morning radio show to comply with his doctors' orders to take it easy.

"I have been ordered to sleep at least six hours a night. They say rest is probably the best medicine," Cannon reveals. "I'm dealing with it. Of course I'm not used to the medicines, but I feel like I'm starting to figure out a lot of holistic ways, meditation and stuff to get through it."

Wife Mariah Carey has been helping with Cannon's recovery. "She made me an egg white sandwich before I left the house this morning. Those are the things I have to be eating now, no more bacon. She takes care of me, makes sure I'm eating what I'm supposed to be."