The pop star was admitted to a medical center in Kansas City, Missouri on April 15 after suffering a bad reaction to medication she had been taking for a sinus infection. She was reportedly discharged last week and now she insists she's ready to get back on the road and pick up her Bangerz tour in Europe after postponing a string of shows in North America.
Cyrus told Seacrest, "I'm doing good, much better."
Explaining what put her in the hospital, the singer added, "Basically I had gotten sick while I was on the road. On the sixth day, I just woke up... it was so scary... I had basically been poisoning myself with something I didn't know I was really scary allergic to."
She spent one night in the hospital and then tried to resume her tour, only to fall ill again.
Miley sought further treatment and was told she would have to spend an extended period of time in hospital.
She added, "It was insane. I was begging the doctors, 'Let me out to go do the show!'
"I was crying because I was so bored. I'm laying here hooked to all these machines. Every two hours, some woman comes in and pokes me with a needle, just miserable... I'm just laying here with nothing to do... I ended up doing some online shopping."
The pop star has confirmed her European tour will begin as scheduled on Friday. She has also added dates to her rescheduled North American trek, which will resume on August 1 at the Nassau Coliseum in Uniondale, New York and wrap up in Chicago, Illinois on August 14.