
TMZ broke the story ... Reid was hospitalized last week in Nice, France for what we were initially told was acute pancreatitis, a bad inflammation of the pancreas that can result in vomiting, nausea, diarrhea and fever.
On Sunday, the 36-year-old tweeted that she actually had food poisoning and hurt her back on a jet ski.
Whatever the ailment -- it's obvious, she's feeling a lot better now.