A source told Daily Mail, "Megan was rushed to hospital this morning with an allergic reaction.
"Doctors are still trying to establish what has caused it and she is currently undergoing tests to determine this."
Megan's had a rough start to 2019.
In January she was rushed to hospital for a bladder infection. Upon her release, she made a serious plea to her 1.8 million Instagram followers.
"Glad to be home after a nightmare few days," she wrote.
"Don't ignore a bladder infection, it WILL spread to your kidneys. Never been so ill in my life."