Christina Applegate has been admitted to hospital after falling ill with a kidney infection

During an episode of her MeSsy podcast, which she recorded from her hospital bed, Christina explained: "I'm like, I wanna be admitted. I'm staying here because I want answers. I want every test that you can possibly think of or ones that you haven't even thought of, and I want them done."

Christina revealed she thought her appendix was bursting, but a CT scan revealed she had a kidney infection which had spread to both sides.

She said: "My brain's like: 'Oh, my appendix is bursting' ... From my back to my front is in so much pain. I'm screaming, and they ordered me an emergency CT at 2 in the morning ...

"I'm just gonna be here [in hospital] Because of this kidney infection, I have to have intravenous antibiotics right now. And that's where we're at."

She went on to admit she was struggling emotionally, adding: "I'm holding in a bag o' tears right now ... I sometimes fall into the nurse's arms like a freako, just like crying."

Christina has since revealed she's been treated for the infection and discharged from hospital to continue her recovery at home.

In a statement to PEOPLE, she said: "I'm home and have been treated for the kidney infection. As far as my ongoing stomach thing, it's a work in progress. I was there 7 days."

Christina was diagnosed with multiple sclerosis - a chronic autoimmune disease that affects the brain and central nervous system - in 2021 and last year she admitted she was really struggling to come to terms with her illness.

She told the MeSsy podcast: "It's kind of scaring me too a little bit because it feels really fatalistic, it feels really 'end of'. I don't mean that, but I'm trapped in this darkness right now that I haven't felt in probably 20-something years. I don't enjoy living. I don't enjoy it. I don't enjoy things anymore."

She later added: "I'm good. Does that take a little bit of the pressure off of all of you? I'm good. Let's address it. We are going to address it. It's a moment. It's a thought. It's a feeling. I was talking about some dark stuff I was thinking and feeling.

"I think it's important to be able to say these things. I dare anyone to be diagnosed with MS or any kind of chronic illness that has taken who you were prior to that moment and go, this is great. You know? No.

"You have moments of feeling like this is tiring and I don't wanna do this. But you do it, and by having friends like you and my beautiful friends that I have, by saying this out loud, it releases the pressure in the balloon, man."