Is any relationship between people who don’t support each other, where there’s conflict and one seeks to undermine the other, where there is competition and there is disrespect.
A toxic relationship is consistently unpleasant and draining for the people in it, to the point that negative moments outweigh and outnumber the positive ones.
People who consistently undermine or cause harm to a partner (whether intentionally or not) often have a reason for their behavior, even if it’s subconscious.
Maybe they were in a toxic relationship, either romantically or as a child. Maybe they didn’t have the most supportive, loving upbringing. They could have been bullied in school. They could be suffering from an undiagnosed mental health disorder.
The most serious warning signs include any form of violence, abuse or harassment, which should be dealt with immediately. But in many cases, the indicators of a toxic relationship are much more subtle: Persistent unhappiness, negative shifts in your mental health, personality or self-esteem, feeling like you can’t talk with or voice concerns to your significant other.