  Image-based sexual abuse (IBSA), like other forms of technology-facilitated
abuse, is a growing threat to people's digital safety. Attacks include unwanted
solicitations for sexually explicit images, extorting people under threat of
leaking their images, or purposefully leaking images to enact revenge or exert
control. In this paper, we explore how people seek and receive help for IBSA on
social media. Specifically, we identify over 100,000 Reddit posts that engage
relationship and advice communities for help related to IBSA. We draw on a
stratified sample of 261 posts to qualitatively examine how various types of
IBSA unfold, including the mapping of gender, relationship dynamics, and
technology involvement to different types of IBSA. We also explore the support
needs of victim-survivors experiencing IBSA and how communities help
victim-survivors navigate their abuse through technical, emotional, and
relationship advice. Finally, we highlight sociotechnical gaps in connecting
victim-survivors with important care, regardless of whom they turn to for help.
