"Scott's been getting horrific bouts of heart-burn that's one drink away from turning into alcohol-related gastritis," an insider told RadarOnline.com. "He also needs 10-12 hours sleep, usually sleeping off a drinking session, but it's never quality sleep."
"There are early signs of jaundice because his ankles are this strange yellow color," the insider added in reference to potential liver disease.
"He's in real bad shape, but he won't stop the partying," the insider noted. "He's killing himself, but he refuses to go to rehab. Instead he's been plotting his funeral and has already bought a plot in Westwood cemetery."
RadarOnline.com previously reported that Kourtney Kardashian's baby daddy has been pounding back liquor and beer like never before, and now Disick, 34, has to take a breathalyzer test before seeing Mason, Penelope and Reign.
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But, the 38-year-old's demands haven't stopped him as he was recently caught partying with Bella Thorne in Los Angeles.
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