The Fashion Police co-host tweeted on Sunday that she received a head injury, urging her followers to watch The Talk on Monday to learn the full story.
"Long story short I cracked my head open then kept passing out I have the all clear my mum came 2 get me 4 full story watch the talk tomorrow (sic)," Osbourne wrote.
Osbourne also expressed her gratitude to the staff of Mercy Hospital in Miami, the facility to which she was admitted.
"I just want 2 thank all the incredible doctors and nurses @ Mercy hospital in Miami 4 taking such good care of me u guys really are amazing! (sic)," she tweeted.
The 27-year-old recently revealed that she finds it difficult to be around women because she can be too honest.
In September, she congratulated her younger brother Jack Osbourne on his engagement to girlfriend Lisa Stelly.