In a preview for Tuesday's Season 4 premiere of the TLC reality series, Tammy shared her decision to return to a weight loss rehab facility, where she learned she was at her highest weight. The day Tammy re-entered the treatment center, however, she was rushed to the hospital.
The clip opened with Tammy being asked about the day she was taken to the hospital.
"I don't remember any of it ... nothing I completely blacked out," she told a producer off-camera. "I woke up like a week later here in the hospital on life support. I don't remember any of it."
The preview then showed footage of Tammy at rehab, where she can be seen standing on a scale.
"Two months ago I decided to go back to rehab. I weighed the most I've ever weighed," she said, as someone told her that she weighed 717 pounds. As she's weighed down the hallway, Tammy broke down in tears, saying, "I just don't feel good."