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When you take a "selfie" with a friend you are not only spreading love, but also possible head lice.

A California lice expert says she's seen a big increase in head lice among teens within the past year. Marcy McQuillian, who works at a head lice removal company says, "Typically it's younger children I treat, because they're at higher risk for head-to-head contact. But now teens are sticking their heads together every day to take cell phone pics."

She says each time she treats a teen she asks about selfies, and they admit that they take them every day. She thinks parents and teens need to be aware of the potential risks.