Is it normal for children to have a "bulimic" phase in their early teens?

No: It is normal for preteens and teenagers to have issues with body image and social stressors. A bulimic phase is an immediate concern and needs to be addressed. It is a cry for help and needs to be addressed quickly.

No: Bulimia refers to binging and purging either by vomiting or laxative abuse. Some early teens may try it once or twice, often at the urging of a peer, and give it up; but, it is not a "usual" behavior that can be safely ignored. Typically, once a teen has started engaging in this cycle, it proves quite difficult to give up and requires experienced professional help to stop it.