The ex-Strictly Come Dancing star decided to quit the ITV show because she's been struggling with the conditions.
'I just can't sleep properly and I can't think properly,' Camilla, 35, told the fellow contestants.
'My brain's not working. It's only three days in, so what's going to happen after this?
'I'm scared because I don't want to put my health in danger and I can't think straight.'
Her exit is expected to air on tonight's show.
Camilla will be replaced by ex-boxer Joe Bugner.
Where to next?
- Rate their chances on I'm A Celebrity
- Latest pics of Bushtucker trial
- Strictly Come Dancing