Lyric discussion by piecexo 

Cover art for I Bruise Easily lyrics by Natasha Bedingfield

I agree with everyone else, but it also could be about, she just got out of an abusive relationship. She telling him(the new guy) that she " Bruise easily so be gentle when you handle me." That she just got out of a relationship that hurt her deeply and she's letting him know now.

My Interpretation