How internet gaming addiction affects mental and physical health

Most people who play video games never develop an addiction. Gaming disorder is a clinically recognized condition that affects a smaller group of players whose gaming becomes compulsive, pushes out other priorities, and continues even when the consequences are serious.

The World Health Organization included it in the ICD-11, and the American Psychiatric Association lists Internet Gaming Disorder in the DSM-5 as a condition warranting further study.

The health effects discussed below apply to individuals who meet that clinical threshold, not everyday players.

Mental health effects associated with gaming disorder

Research has consistently linked Internet Gaming Disorder to a range of mental health conditions. The most common is depression, with symptoms described as enduring sadness, withdrawal from other activities, a lack of motivation and emotional emptiness. Anxiety, too, is a frequent companion, manifesting as over-worrying, irritability, restlessness and stress that peaks when gaming is unavailable. Gaming as a way of coping with anxiety often leaves the sufferer with more compulsive behaviour than the resolution of it.

Other mental health impacts noted in the research are:

• Social isolation when gaming replaces family time, friendships, school attendance and hobbies
• Emotional dysregulation, including frustration, mood swings and gaming as a primary outlet for stress
• Sleep disturbance, including delayed bedtime, less sleep, poorer sleep quality and daytime fatigue
• Attention and academic problems, including difficulty concentrating, incomplete homework, declining grades and poor time management

A 2023 systematic review of 39 longitudinal studies involving more than 37,000 subjects identified modifiable risk factors for Internet Gaming Disorder as: longer daily gaming time, loneliness, poor peer relationships, reduced social support and lower school engagement. A 2025 PRISMA systematic review found Internet Gaming Disorder was consistently associated with higher levels of psychological distress, although the direction of causation is an area of current research.

Altered activity in areas involved in reward processing, impulse control, decision-making and emotional regulation has been reported in individuals with Internet Gaming Disorder in brain imaging studies. Researchers caution that additional studies are needed to determine whether these neurobiological differences precede the disorder, result from it, or both.

Physical health effects associated with compulsive gaming

The physical consequences of gaming disorder are less discussed but well documented across clinical research:

• Musculoskeletal pain: Repetitive use of controllers or keyboards during long gaming sessions can result in pain across the neck, shoulders, back, wrists, hands, and elbows, with poor ergonomics worsening the effects over time.
• Eye strain: Long screen sessions lead to dry eyes, blurred vision, eye fatigue, and digital eye strain headaches.
• Sedentary behavior: Sitting for extended periods of time every day while gaming can reduce physical activity, increase weight gain, and decrease cardiovascular fitness, posture, and muscle conditioning.
• Poor nutrition: Nutrition often suffers when gaming becomes excessive, with meals skipped, fast food consumed regularly, caffeine overused, and meal timing thrown off in ways that build toward fatigue and other health problems.
• Headaches: Many people with problematic gaming habits report suffering headaches from eye strain, poor sleep, and dehydration.

Why these health effects matter in video game addiction lawsuits

Lawsuits filed against Epic Games, Roblox Corporation, Activision Blizzard, Microsoft, and Electronic Arts allege that developers deliberately incorporated psychological design features that foreseeably produce compulsive use in adolescents, including variable reward systems, endless progression mechanics, social pressure features, and microtransaction loops. Plaintiffs in active cases point to the mental and physical health effects described above as the documented injuries those design choices produced.

To qualify for the current litigation, a claim must show more than heavy gaming. Courts evaluating these cases look for documented medical harm in the form of a clinical diagnosis, evidence of treatment through therapy, medication, hospitalization, or residential care, and records demonstrating that the gaming behavior preceded and contributed to the injury. Basic evidence in these claims consists of school records to show academic failure, psychiatric records to confirm the diagnosis, and records of treatment costs.

The defendants deny these allegations, and contend that the plaintiffs have not shown a sufficient causal link between the particular design features and the alleged injuries. No industry-wide liability has been established, and the litigation is still in its early stages.

Atraxia Law will evaluate your video game addiction claim

If your child developed depression, anxiety, gaming disorder, or other diagnosed conditions from compulsive gaming and needed medical treatment or therapy, those injuries may support a product liability claim against the developers whose design choices contributed to the harm. Our team has spent more than 35 years helping families determine whether they have a viable case and connecting qualifying families with attorneys ready to represent them. Reach out today for a free and confidential case evaluation.