Signs of a "toxic" teenager: what's really going on, and what to do

If you've searched for signs of a "toxic" teenager, you're probably exhausted. Maybe your teen is cruel, manipulative or contemptuous, and nothing you do seems to reach them. Using that word usually means a parent has hit a wall, and it's worth taking seriously. It's also worth looking at what's really going on, because the label rarely helps you fix it.

This guide looks at the behaviors parents often mean by "toxic," what can drive them, when they're part of adolescence and when they're a sign of something more, and what to do. It's part of our guide to disrespectful teenagers.

What do parents mean by a "toxic" teenager?

Usually a pattern rather than one behavior: constant contempt, cruelty or insults, manipulation, lying to get their way, blaming everyone else, entitlement, and little sign of remorse. When these pile up, a parent can feel they're living with an adversary rather than a child. Naming the specific behaviors is more useful than the label, because behaviors can be changed.

Signs parents describe

These are the behaviors parents most often mean. Many teens show some of them for a while. What matters is how many, how often, how long, and whether they're getting worse. A pattern that's persistent, severe and spreading beyond home is the one to take seriously, and to take to a professional rather than managing alone.

• Contempt and cruelty: insults, mocking, deliberately hurtful comments.
• Manipulation: playing parents against each other, guilt-tripping, twisting what was said.
• Chronic lying, especially to avoid consequences or get their way.
• Blaming others for everything, never taking responsibility.
• Entitlement: expecting things without effort, reacting badly to no.
• No apparent remorse after hurting someone.

Normal adolescence, or something more?

Many of these behaviors appear, in milder forms, in ordinary teenagers: self-focus, testing limits, occasional cruelty in anger, lying to avoid trouble. It becomes more concerning when the behaviors are frequent, severe, aimed at everyone, last for months, and come with aggression, rule-breaking outside the home, or signs of depression.

Can a teenager be a narcissist?

Some self-focus is a normal part of adolescence, while identity is still forming. For that reason, professionals are generally cautious about diagnosing personality disorders in teenagers, and diagnostic frameworks differ on age, as a review of personality disorder in adolescents discusses. A teen who seems self-absorbed is not necessarily a narcissist.

If your teen persistently lacks empathy, exploits others and shows no remorse, don't reach for a label. Get a proper evaluation from a mental health professional experienced with adolescents. They can assess what's going on and what will help.

Is my teenager gaslighting me?

Parents sometimes use "gaslighting" for a teen who denies things that clearly happened or twists conversations until the parent doubts themselves. Some of this is ordinary teenage self-protection: denying, minimizing and rewriting events to avoid trouble. Keep a calm, simple record of what was agreed, and don't get pulled into debating what happened.

Try: "We see it differently. The rule we agreed is still the rule." Writing down agreements, like curfews and chores, reduces the room for disputes about what was said.

What can drive these behaviors?

Several things can, and often more than one at once: difficulty managing emotions, untreated depression or anxiety, ADHD, substance use, trauma, a family environment with a lot of conflict, or learning that manipulation gets results. Two conditions a professional may consider are oppositional defiant disorder and conduct disorder.

MedlinePlus describes conduct disorder as a set of ongoing emotional and behavioral problems in children and teens, and notes that treatment works best when it starts early and the family is involved. AACAP describes ODD as an ongoing pattern of hostile, defiant behavior toward authority. Only a professional can assess either.

How to deal with a "toxic" teenager

Hold firm, stay calm, and don't match their behavior. Set clear limits on cruelty and manipulation, agree rules with the other parent so they can't be split, and follow through consistently. At the same time, keep looking for the teen underneath the behavior, and get professional help if the pattern is persistent. Labels close doors. Curiosity keeps them open.

• Don't take the bait. Short, calm responses to provocation.
• Present a united front with the other parent.
• Document patterns briefly, to share with a professional.
• Protect siblings from cruelty or manipulation.
• Look after yourself: see when your teenager is making you miserable.

How to talk to your teen about their behavior

Choose a calm moment, describe specific behaviors rather than character, and say how they affect the family. "When you mock your sister, she ends up in tears" lands better than "you're so toxic." Ask what's going on for them, and listen. Then be clear about what has to change, and what support you'll offer, including talking to someone outside the family.

Protecting siblings and yourself

If a teen is cruel or manipulative toward siblings, protect the younger children first: supervise, separate when needed, and make sure they can tell you what's happening. Look after yourself as well. Living with a hostile teenager is draining, and parents often need support of their own to stay steady.

What doesn't help

Name-calling, public shaming, harsh or endless punishments, and cutting a teen off emotionally tend to entrench the very behaviors you want to change. So do parents disagreeing openly about how to respond. Consistent limits, calm responses, professional help and a relationship that stays open, however hard, give the best chance of change.

Why the label can make things worse

Once a parent thinks of their teen as "toxic," it's easy to see everything they do through that lens, and teenagers tend to live up to the roles they're given. The label can also shut down the question of what's driving the behavior. Keeping the focus on specific behaviors, and on getting help, keeps change possible.

Keeping perspective

Many teenagers who seem cold, cruel or manipulative at 14 or 15 grow into warm, thoughtful young adults, especially when parents hold steady limits and keep the relationship open. That's not a reason to ignore serious behavior. It's a reason not to write your teen off, and to keep looking for help until you find what works for your family.

When to get help

Get help if the behaviors are persistent and severe, if there's aggression, cruelty to siblings or animals, theft, running away or substance use, or if you see signs of depression. Start with your teen's doctor for a referral to a mental health professional who works with adolescents and families. Family therapy can help the whole household.

You can find licensed family therapists through the American Association for Marriage and Family Therapy. If behavior has become dangerous, see what to do when a teenager is out of control.

Frequently asked questions

Written by the The Adolescent Years editorial team. Last reviewed September 25, 2026. How we write and check our guides.