It can affect their wellbeing, their educational attainment, family and peer relationships, and their ability to enjoy health, happy, respectful relationships now and in the future.
Gall effeithio ar eu lles, eu cyrhaeddiad addysgol, eu cydberthnasau â'u teulu a chyfoedion, a'u gallu i fwynhau cydberthnasau iach, hapus, llawn parch nawr ac yn y dyfodol.