Bagel head

[1] It is a temporary (6- to 24-hour) swelling distortion of the forehead created by a saline drip and often shaped to resemble a bagel or donut.

In 2012, after appearing on a National Geographic TV special, this practice became the subject of sensationalism as news outlets worldwide misleadingly declared it a "Japan trend".

The procedure involves the subject taking a 300–400 cc medical-grade saline injection to the mid-forehead over a period of two hours, which is then often given a depression in the center, leading to the "bagel head" name.

[2] The procedure was documented in an episode of the National Geographic Channel's Taboo series, arranged and coordinated by TV fixing company La Carmina and the Pirates.

Ibrahimi was additionally concerned that repeated injections could lead to the forehead skin sagging, which Maeda says does not happen no matter how many times it is performed.