The 36-year-old reality TV star had been complaining about feeling unwell throughout the day, reported TMZ.
After she vomited several times, June passed out when she walked down the stairs in her house.
She regained consciousness, but she repeatedly fainted. Worried about the star's condition, her daughter Pumpkin took her to the hospital.
June has been reportedly "pushing it with her diet lately," and she admitted that she hadn't eaten much at the time.
June is still in the hospital, where doctors are running tests to determine the cause of her faint. They plan on giving her a CT scan and taking blood work.