The tattoo model and Ex On The Beach star took to the Diary Room in the house on Sunday to request to leave.
At 11:51AM she complained: “I wanna go. Everything's getting on top of me.
“I’m getting fat, I’m getting a flat a**e, my bum’s going because I’m not doing squats. My skin's gone and my head's gone.
“I'm just used to looking after myself a lot better.”
Jemma added: ”I don’t want to be in here with a spotty a**e and a fat stomach.”
After sharing her plans to quit with the other housemates, they were quick to rally around Jemma.
“I think you look unbelievable,” Amelia Lily said.
“I’m the one with the fat stomach,” Sandi Bogle remarked.
Jemma is one of six housemates facing eviction this week following nominations in the house over the weekend.
Jemma, Sarah Harding, Chad Johnson, Sam Thompson, Sandi Bogle and Helen Lederer are all up for the axe.
Two of the six will get the axe in Tuesday night's latest live show.
Sarah had seven nominations, Chad had five nominations and Jemma three nominations. Sandi, Sam and Helen all had one nomination.
All housemates who received one nomination was put up for eviction.
Amelia, Derek and Shaun had no nominations.
Celebrity Big Brother continues nightly on Channel 5.
The double live eviction airs Tuesday from 9PM with host Emma.
The Celebrity Big Brother 2017 final takes place on Friday.