San Francisco authorities are investigating a mother who admitted on national TV that she regularly gives her 8-year-old daughter Botox injections in her face before entering child beauty pageants, the local ABC station reports.

Kerry Campbell said she got the idea from other pageant mothers, calling it "pretty much, like, the thing. I'm not the only one who does it."

The Food and Drug Administration does not recommend Botox for anyone under 18. The injections are also often painful, as Campbell's daughter, Britney, acknowledged.

"It's pretty unusual for a mom to be injecting an 8-year-old with Botox and certainly is grounds for an investigation," said Trent Rohrer of child protective services at the San Francisco Human Services Agency. "We need to sit down and talk with the mom, talk with the child, and see what's going on."

Rohrer said his office was flooded with calls after Campbell and her daughter appeared Thursday on ABC's Good Morning America. Police have joined the investigation.

Campbell, who describes herself as a part-time aesthetician, defended the anti-wrinkle injections and leg waxings she gives Britney.

"We were getting into the pageants," said Campbell, who has also injected her own face with Botox. "I knew she was complaining about her face, having wrinkles, and things like that. When I brought it up to Britney she was all for it."

Said Britney, "I just, like, don't, like, think wrinkles are nice on little girls."

Campbell said she buys Botox online and typically gives Britney five shots, in three locations. Britney admitted it hurt but said she was used to the pain.

Two years ago the FDA ordered that Botox and similar drugs must carry warning labels explaining that the material can potentially spread from the injection site to distant parts of the body and possibly cause problems with breathing or swallowing, among other serious difficulties.