Henry Lamb / Photowire / BEImages / Rex USA 1 / 6
Henry Lamb / Photowire / BEImages / Rex USA 1 / 6

What is wrong with Mama June Shannon? That seems to be the question baffling doctors.

The "Here Comes Honey Boo Boo" star was rushed to the hospital on March 2 after she collapsed at home.

Now, though, after a battery of tests, doctors are befuddled and can't seem to figure out exactly what is causing Mama June's fainting spells, according to TMZ. In fact, the tests all keep coming back normal.

Mama June will remain in the Georgia hospital for at least another evening as doctors try to come to a conclusion.

The celebrity website says Mama June has her own theory, though, and it's related to stress. The reality star said she's been extra stressed out lately ever since "Marriage Boot Camp" began airing, a show in which in her husband, Mike "Sugar Bear" Thompson, admitted to cheating on her with men.

The couple has been fighting about the show constantly, according to the report.

Before being admitted to the hospital, June had been complaining about feeling ill and had thrown up several times throughout the day. Earlier reports said she passed out right after walking down the stairs in her house.

After coming to, she continued to have fainting spells. Her daughter Lauryn "Pumpkin" Shannon eventually drove her to the hospital.

Alana Thompson, also known as Honey Boo Boo, has visited her mom in the hospital. A photo taken of Honey Boo Boo shows her smiling for the camera as her mom rests in a hospital bed.

June, who has been battling weight issues, had apparently been really going full speed ahead on her diet and admitted that she hadn't eaten much after passing out. Last May she said she had lost 45 pounds.

In an interview with In Touch in December, June said she had gone from a size 28 to a size 16 thanks to her weight loss.

"Honestly, when I first started losing weight, it was just being more active, being busy with the show and doing more things with 'Here Comes Honey Boo Boo,'" she said.

"I met with this trainer [Natasha Fett] through my manager," she said. "Even though she's 3,000 miles away, she's still very supportive through everything.

"I'm just walking through the neighborhood three miles a day, and just keeping up with that and just keeping up with the kids and just kind of being on the go all the time."