Bitter Dumpling

Bitter Dumpling (苦団子, Niga-Dango) is a mystic, famous, emetic herbs medicine given to Chihiro by a powerful river god in return for Chihiro's service in Bathhouse.

As its name suggests, it resembles a dango in general shape, and tastes extremely bitter and astringent.

Chihiro later fed Haku with it to egest a curse by Yubaba which took a form of a worm within his body when Haku stole Zeniba's witch seal.