Your daughter stopped eating meals with the family. She takes her phone to her room and you hear her scrolling until 2am, 3am, sometimes until dawn. When you ask her to put it down, she becomes someone you do not recognize—panicked, angry, inconsolable. Her pediatrician used words like major depressive disorder and generalized anxiety. The therapist mentioned self-harm. You keep asking yourself what you missed, what you did wrong, why you did not see this coming sooner.
Or maybe it is your own story. You are 19 now, maybe 22, and you can trace the worst years back to middle school. Back to when the apps became everything. When you started measuring your worth in likes and comparing your body to faces in filters that were not even real. When the algorithm learned exactly what kept you scrolling and fed you content that made you feel worse and worse about yourself, but you could not stop watching. The eating disorder, the anxiety attacks, the days you could not get out of bed—you thought it was just you. That you were weak or broken or uniquely unable to cope with modern life.
What you are learning now, what hundreds of families are learning as they read court filings in federal litigation, is that it may not have been just you. It may have been by design.
What Happened
The injury is not visible on an X-ray. It does not show up in bloodwork. But it is real, and it is devastating.
Teenagers and young adults who spent years on platforms like Instagram, TikTok, and Snapchat during their adolescence began showing up in therapists offices and emergency rooms with clusters of mental health conditions. Major depression that made it hard to get out of bed or see a future. Anxiety so severe it triggered panic attacks and school avoidance. Obsessive thoughts about body image that spiraled into anorexia, bulimia, binge eating disorder. Self-harm—cutting, burning—as a way to manage feelings that felt too big to contain. In the most tragic cases, suicide attempts and completed suicides.
Parents watched their children change. Kids who had been outgoing became withdrawn. Kids who had been confident became consumed with how they looked, how many followers they had, whether anyone liked their posts. Sleep schedules collapsed as teens stayed up refreshing feeds, waiting for notifications, caught in cycles they described as compulsive. When parents tried to take the phone away, the reaction was not normal disappointment. It looked like withdrawal. Panic. Desperation.
The young adults who lived through it describe something similar. A feeling of being unable to stop, even when the apps made them miserable. A sense that the platforms knew exactly what to show them to keep them engaged, even when that content was harmful. A realization, years later, that the worst period of their mental health lined up exactly with the years they were most active on social media.
The Connection
Social media platforms are engineered to maximize engagement. That is not a secret. The business model depends on keeping users on the platform as long as possible so they see more ads. What the lawsuits allege is that these companies knew their design choices were particularly harmful to adolescent users, and they deployed those features anyway.
The human brain does not finish developing until the mid-twenties. The prefrontal cortex, which governs impulse control and decision-making, is still forming during adolescence. The reward pathways, on the other hand, are hypersensitive during this period. Teenagers are neurologically wired to seek social approval and to respond intensely to peer feedback. This is normal development. It becomes dangerous when it is algorithmically exploited.
The platforms use variable reward schedules—the same mechanism that makes slot machines addictive. You do not know when the next like, comment, or message will come, so you keep checking. The dopamine hit from social validation triggers the same reward pathways as gambling or substance use. For a teenage brain, this is especially powerful.
The lawsuits cite research on these mechanisms. A 2017 study published in Psychological Science found that adolescents showed increased activation in brain reward centers when viewing photos with more likes, and that this social feedback influenced their own liking behavior. A 2019 study in JAMA Pediatrics tracked more than 6,000 adolescents and found that those who spent more than three hours per day on social media had significantly higher risk of mental health problems. By 2021, a meta-analysis in JAMA Psychiatry reviewing 22 studies concluded there was a small but significant association between social media use and depression in adolescents.
The algorithmic feeds learn what content keeps each user engaged. For teenage girls, the lawsuits allege, the platforms learned that content related to body image, dieting, and appearance kept them scrolling. The algorithm then showed them more of it. Instagram and TikTok feeds became streams of filtered selfies, weight loss content, and comparisons that research has linked to body dissatisfaction and eating disorders. A 2020 study in the International Journal of Eating Disorders found that Instagram use was associated with increased symptoms of orthorexia and increased likelihood of eating disorder diagnosis among college women.
The infinite scroll means there is no natural stopping point. Autoplay means the next video starts before you decide to watch it. Snapstreaks create artificial urgency—if you do not send a photo every 24 hours, you lose the streak, you let your friend down. These are not accidental features. They are design choices that exploit adolescent psychology to maximize engagement time.
What The Lawsuits Allege They Knew
In October 2021, a former Facebook product manager named Frances Haugen testified before Congress and released thousands of pages of internal company documents. Those documents, according to the lawsuits, showed that Meta was conducting research on how Instagram affected teenage users, and that the findings were troubling.
According to documents cited in the consolidated complaints, Facebook researchers reported in 2019 that 32 percent of teen girls said that when they felt bad about their bodies, Instagram made them feel worse. Internal research presented in March 2020, according to the lawsuits, found that among teens who reported suicidal thoughts, 13 percent of British users and 6 percent of American users traced the desire to kill themselves to Instagram. A September 2021 internal presentation, as described in court filings, noted that social comparison is worse on Instagram than other platforms because Instagram is about bodies and lifestyle.
The lawsuits allege that Meta knew Instagram was contributing to body image issues, depression, anxiety, and suicidal ideation in a significant subset of teenage users, particularly girls. The complaints cite internal presentations where researchers discussed these findings and where company leaders were reportedly briefed on the risks.
The litigation further alleges that despite this internal research, Meta continued to deploy features designed to increase engagement among young users. According to the complaints, the company explored creating an Instagram for Kids product aimed at users under 13, even as internal documents allegedly showed concern about the impact on existing teen users. That project was paused after public outcry in 2021, but the lawsuits allege the underlying design features that maximize engagement remained in place on the main platform.
Similar allegations are made regarding TikTok. The lawsuits cite internal communications described in media reports and regulatory filings. According to a 2023 investigation by Kentucky Public Radio based on leaked internal documents, TikTok executives were informed that the average user session lasted about 10 minutes, but that compulsive use was much higher among teenage users. The lawsuits allege that TikTok designed its algorithm to be especially engaging for younger users, showing them content calibrated to keep them watching, even when that content was related to mental health struggles, self-harm, or eating disorders.
Court filings point to a 2022 study published in Social Media + Society which analyzed TikTok recommendation algorithms and found that users who viewed eating disorder content were rapidly served more extreme content on the same theme, creating what researchers called rabbit holes that could reinforce harmful behaviors.
Snapchat faces similar allegations. The lawsuits claim that Snap Inc knew that features like Snapstreaks—which reward users for sending photos back and forth every day—created compulsive checking behavior, particularly among teens who felt social pressure to maintain streaks. According to the complaints, the company was aware that losing a streak caused significant distress to young users, yet continued to promote the feature because it drove daily engagement.
The litigation also references a 2018 study from the University of Pennsylvania, published in the Journal of Social and Clinical Psychology, which found that limiting social media use to 30 minutes per day led to significant reductions in loneliness and depression among college students. The lawsuits allege that despite growing public research on the mental health impacts of heavy social media use, the companies continued to design their platforms to encourage unlimited use.
What The Lawsuits Say About Concealment
The complaints allege that the companies did not just fail to warn users about potential harms—they actively concealed what their research showed.
According to the lawsuits, Meta conducted extensive internal research on teen mental health impacts but did not make those findings public. The complaints allege that when Frances Haugen released the internal documents in 2021, it was the first time the public saw research that Facebook had been conducting for years. The lawsuits claim that while Meta publicly emphasized the positive aspects of connection and community, internal researchers were documenting significant mental health harms that were not disclosed to users or parents.
The litigation further alleges that Meta resisted efforts to implement features that could reduce harm if those features might also reduce engagement. According to court filings, internal discussions about take a break reminders and time limit tools allegedly showed concern that such features could decrease usage metrics. The complaints claim that when such tools were eventually introduced, they were opt-in, not default settings, and were not prominently promoted to users.
The lawsuits allege that TikTok similarly did not disclose what it knew about compulsive use patterns. According to the complaints, while the company publicly stated that it cared about user wellbeing and introduced a 60-minute daily screen time default for users under 18 in 2023, internal data allegedly showed the company knew users were spending far more time on the app and that the algorithm was designed to maximize that time.
Court filings claim that Snapchat promoted itself as a more private, less permanent alternative to other platforms, but did not disclose research about the anxiety-inducing effects of features like Snapstreaks. The lawsuits allege the company was aware that the fear of losing streaks was causing teens to feel tethered to their phones, but continued to make streaks a central feature because of the engagement it generated.
The complaints also allege broader concealment through funding favorable research. The lawsuits claim that the companies funded academic research and think tanks that produced studies emphasizing the benefits of social media connection while downplaying harms. According to court filings, this created a distorted public discourse where independent research showing harms was countered by industry-funded research showing benefits, making it harder for parents, educators, and policymakers to assess the real risks.
Why Your Doctor May Not Have Told You
When a teenager shows up with depression or an eating disorder, clinicians assess many potential causes. Family history. Trauma. Academic stress. Social difficulties. Hormonal changes. The idea that a smartphone app could be a significant contributing cause is relatively new in clinical thinking.
For years, the public health guidance was uncertain. Some studies showed correlations between social media use and mental health problems. Other studies, sometimes funded by the platforms themselves, showed weaker correlations or emphasized that social media could also provide connection and support. Without clear consensus, and without knowing what the companies internal research showed, doctors often did not think to ask detailed questions about social media use.
The lawsuits allege that this confusion was not accidental. According to the complaints, the companies public statements emphasized positive uses—staying connected with friends, finding community, creative expression—while their internal research allegedly showed significant harms they were not discussing publicly. The litigation claims this created an information gap. Parents and doctors were making decisions without access to the research the companies had conducted.
Pediatricians and therapists also face time constraints. A 15-minute appointment does not allow for deep exploration of every environmental factor. If a teen is presenting with depression, the immediate focus is on safety, symptoms, and treatment options like therapy or medication. The question of whether specific app features are exploiting that teen brain development may not come up, especially if the doctor does not know to ask it.
The lawsuits further allege that even when concerns about social media and mental health entered public discourse, the companies responded with user education campaigns that put responsibility on individuals and families. According to court filings, the message was essentially: our platforms are tools, and it is up to users to manage their time and use them in healthy ways. The complaints allege this framing obscured the reality that the platforms were designed to be difficult to put down, particularly for adolescent users whose brains were still developing self-regulation capacity.
Who Is Affected
The lawsuits generally involve young people who used Instagram, TikTok, Snapchat, or other social media platforms heavily during adolescence and subsequently developed mental health conditions.
If you are a parent, think about your child use pattern during middle school and high school. Was your child on Instagram, TikTok, or Snapchat for multiple hours per day? Did you notice changes in mood, self-esteem, sleep, or eating habits that coincided with increased social media use? Did your child receive a diagnosis of depression, anxiety, an eating disorder, or engage in self-harm? Did your child require therapy, psychiatric medication, or hospitalization for mental health crisis?
If you are a young adult looking back at your own experience, consider the timeline. Did you start using these platforms in your early teens? Did you feel compelled to check constantly, even when it made you feel worse? Did you experience anxiety about likes, comments, followers, or streaks? Did you compare yourself to others and feel inadequate? Did you go down rabbit holes of content related to appearance, dieting, or mental health struggles? Did you develop depression, anxiety, body image issues, or an eating disorder during the years you were most active on these platforms?
The litigation encompasses a wide range of severity. Some cases involve teenagers who required psychiatric hospitalization. Some involve suicide attempts. Others involve years of therapy and medication for depression and anxiety. Some involve ongoing struggles with eating disorders that began in adolescence. The common thread is significant mental health harm that families and individuals believe is connected to social media use during a vulnerable developmental period.
The lawsuits are generally focused on use that occurred during adolescence—roughly ages 10 to 19—because that is when the brain is most vulnerable to the mechanisms the platforms allegedly exploit. However, some cases involve young adults who continued heavy use into their twenties and experienced ongoing or worsening mental health effects.
Where Things Stand
As of early 2025, hundreds of lawsuits have been filed against Meta, TikTok, Snap, and other social media companies on behalf of minors and young adults alleging mental health harms. The cases have been consolidated into multidistrict litigation in the Northern District of California under the umbrella In re Social Media Adolescent Addiction/Personal Injury Products Liability Litigation.
The litigation includes cases brought by individual families and cases brought by school districts seeking to recover costs associated with addressing the youth mental health crisis. More than 40 states have also filed suits against Meta specifically, alleging that the company knowingly designed Instagram to addict children and teens and that it misled the public about the safety of its platforms.
The defendants have denied the allegations. Meta has stated that it has developed tools and resources to support teen safety and that it is committed to providing age-appropriate experiences. TikTok has pointed to features like screen time management tools and has stated that the wellbeing of its users is a priority. Snap has emphasized that Snapchat is designed for close friends and has features intended to promote digital wellbeing.
The cases are in relatively early stages. The companies have filed motions to dismiss, arguing among other things that they are protected by Section 230 of the Communications Decency Act, which provides immunity to online platforms for content posted by users. Plaintiffs counter that their claims are not about user-generated content but about the design of the platforms themselves—the features and algorithms that allegedly addict young users. Courts are working through these arguments.
In some jurisdictions, discovery is beginning. This means plaintiffs attorneys are seeking access to internal company documents, research, communications, and data about how the platforms are designed and what the companies knew about impacts on young users. This process will likely take years.
There have not yet been trials or verdicts in these cases. There have been no settlements announced in the personal injury cases, though some states have reached agreements with the companies over separate issues like privacy violations or deceptive trade practices. The timeline for resolution is uncertain, but multidistrict litigation of this scale typically takes several years to work through the court system.
New cases continue to be filed. Families who believe their children were harmed are consulting attorneys and joining the litigation. The legal theories are still developing as more research emerges and as discovery potentially reveals more internal documents.
What is clear is that this litigation represents a significant legal challenge to the social media industry business model. The cases ask courts to consider whether companies can be held liable for designing products that allegedly exploit adolescent psychology in ways that cause mental health harm. The outcomes will likely shape how these platforms operate in the future and whether they have legal obligations to prioritize user wellbeing over engagement metrics.
The lawsuits allege that what happened to your child, or to you, was not random. It was not bad luck or bad genes or failure of willpower. The complaints describe a business model that required maximizing engagement, research that allegedly showed the costs of that model for teenage mental health, and decisions to continue deploying the most engaging features despite those costs. These are allegations that will be tested in court. But they are based on documents, on research, on the testimony of former insiders. They ask the question: when a company knows its product is harming children and continues to profit from that harm, who should bear responsibility?
You did not fail your child. Your child did not fail themselves. If the lawsuits allegations are proven, what happened was a set of design choices made in boardrooms by people who had data about the risks. The path forward may be long and uncertain, but it begins with seeing clearly what happened and why. And with knowing that you are not alone in asking for accountability.