Mel B described what had happened while she was co-hosting Australian radio station 2DayFM yesterday, the Daily Mail reports.
Explaining what had happened live on air, she said: "This morning’s been a little bit crazy because my six-year-old, Angel, was feeling not very well yesterday, dizzy and had her first ever nose bleed so I kept her off school.
"And then this morning, [she was] completely disoriented and blood was just funnelling like there was no tomorrow, so I took her to the emergency room."
The cause of the bleeding is yet to be determined, the singer said.
"They don’t know [what's wrong]. They’ve done a bunch of blood tests so we’re just waiting for that stuff to come back," she added.
Scary Spice said last month that she would love another Spice Girls reunion to mark the band’s 20th anniversary in 2014.
She wants to go on tour with Melanie C, Emma Bunton, Geri Halliwell and Victoria Beckham.
The girls were a hit with a one-off appearance at the Olympics closing ceremony in 2012, but Posh Spice Victoria is now a big name in fashion and has no wish to revive her pop career.