Travis Barker and Kourtney Kardashian Open Up About His 'Life-Threatening' Pancreatitis

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Travis Barker is shedding some light on his health.

The Blink-182 drummer, 46, said he is "currently much better" as he updated his 7.5 million Instagram followers Saturday after he was hospitalized earlier this week due to "life-threatening" pancreatitis.

"I went in for an endoscopy Monday feeling great," he recounted on his Instagram Story. "But after dinner, I developed excruciating pain and have been hospitalized ever since.

RELATED: Kourtney Kardashian 'Won't Leave' Travis Barker's Side in Hospital After Crippling Stomach Pain

"During the endoscopy, I had a very small polyp removed right in a very sensitive area, usually handled by specialists, which unfortunately damaged a critical pancreatic drainage tube. This resulted in severe life-threatening pancreatitis.

"I am so very very grateful that with intensive treatment, I am currently much better," Barker added.

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Barker's wife Kourtney Kardashian also noted that they were "so touched and appreciative" for the support they've received, sharing an update on her own Instagram Story.

"Oh what a scary and emotional week it has been. Our health is everything and sometimes we take for granted how quickly it can change," Kardashian wrote. "Travis and I went in for a routine endoscopy together and he ended up with severe, life-threatening pancreatitis."

The Poosh founder added that she's "so grateful to God for healing my husband," as well as to their fans' prayers and the specialists, doctors and nurses at Cedars-Sinai Medical Center in Los Angeles "for taking such wonderful care" of them.

"It's crazy how sometimes words could never truly express the gratitude or feelings I have inside of me," Kardashian wrote in a follow-up Instagram Story.

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Kardashian was previously seen accompanying Barker on Tuesday as he was rolled into Cedars-Sinai on a stretcher in a photo obtained by TMZ.

A source told PEOPLE he was suffering from pancreatitis, an inflammation of the organ that aids in digestion and regulating blood sugar. "He was complaining of cramps," they said.

"Kourtney was worried yesterday. They both were," another insider said. "Travis was suffering from extreme stomach pain and could barely walk." An additional source said that Kardashian "won't leave his side" in the hospital.

Barker's daughter Alabama Luella, 16, asked fans to "please send your prayers," as his ex-wife Shanna Moakler's daughter Atiana De La Hoya, 23, whom she shares with Oscar De La Hoya, also opened up to her followers.

RELATED VIDEO: Travis Barker Hospitalized for Pancreatitis After 'Complaining of Cramps': Source

"Thank you for the outpouring of love and prayers sent our way at this time," Atiana wrote on her Instagram Story. "It is heard, felt and appreciated Xx."

Moakler, 47, even expressed her gratitude to fans for showing their support, writing that her ex "has beat the odds numerous times and I know with his support system he will do it again. I will always be there for him and my children."

"Thank you to everyone who has reached out with concern to my ex and father of my children," she wrote. I know he is in great hands and surrounded by loving support and the best medical teams available and his beautiful wife Kourtney," Moakler added. "I pray for a speedy recovery and for the comfort of my children as I know they are very concerned and worried."

Barker was married to Moakler from 2004 to 2008, and they also share 18-year-old son Landon Asher, in addition to daughter Alabama.