LOS ANGELES — You can bring your beach towels and floral headbands, but forget that selfie stick if you’re planning to go to the Coachella or Lollapalooza music festivals.

The devices, which grasp cellphones to allow people to take pictures of themselves farther away from their faces, are banned at this summer’s festivals in Indio, Calif., and Chicago. Coachella dismissed them as “narsisstics” on a list of prohibited items.

Selfie sticks have become a popular but polemical photo-taking tool: Avid picture takers like snapping their own shots in front of monuments and sunsets, but critics dismiss them as obnoxious and potentially dangerous to others around them.

A spokesman for Coachella would not comment on the restriction. Lollapalooza representatives did not return a request for comment but on the festival’s Twitter account said the decision was being made “for safety, to speed security checks at the gate & to reduce the number of obstructions between the fans and the stage.”