Toxic relationships are characterized by a pattern of behavior that involves emotional manipulation, control, and abuse, leaving the victim feeling drained, anxious, and trapped. These relationships often start with a sense of euphoria or intense infatuation, but gradually deteriorate into a cycle of criticism, blame, and emotional blackmail. Ultimately, toxic relationships can have long-term consequences on an individual's mental and emotional well-being, including depression, anxiety, and even PTSD.