Experts are warning that selfies may be behind an uptick in cases of head lice, according to a report. The parasites that typically infect the scalp and skin and are usually spread by close contact or sharing combs and brushes may be taking advantage of group self portraits to find a new host, the Washington Post reported. Teenagers and children posing with each other for selfies, pressing their heads together to fit in the picture frame, could give lice an opportunity to crawl from one head to another, the report said. Selfies “serve as a significant transmission source,” Federico Galassi, a …