If you are having a gauze pack than put it inside the bleeding area and bite gently over it. Continue changing the gauze until it stops bleedins. After that immediately rush to dentist who will have a look at the condition.
The bleeding is due to laceration caused after the tooth got out of the cavity. Take care not to poke into the empty area, do warm saline gargles after 12 hours, Don't brush in that area and dont spit as it may dislodge the clot formed.
For more and detailed info on such type of dental emergencies visit the link...http://www.identalhub.com/dental-broken-or-knocked-out-baby-tooth-924.aspx
Free Dental Consultation