Teenagers who engage in self-harm are more likely to struggle with understanding and managing their own emotions than with any broad intellectual or cognitive impairment, according to a new review of the psychological evidence. The research suggests that the way young people process distressing feelings plays a more central role in self-harm than has previously been appreciated in mainstream clinical practice.
The review, published in the journal Psychology International, examined three overlapping areas of psychological functioning in adolescents who self-harm without suicidal intent, a behaviour known clinically as non-suicidal self-injury or NSSI. Researchers focused on emotional processing, executive functioning, and social and interpersonal cognition, finding that emotional difficulties consistently emerged as the strongest area of concern across the available evidence.
Adolescents who self-harm were found to have particular difficulty identifying, labelling and regulating their emotional states. Many appeared to experience distress as overwhelming or poorly understood, and some showed signs of alexithymia, a condition in which people struggle to recognise or put words to what they are feeling. The research suggests that for some teenagers, self-harm may serve as a concrete physical means of managing internal states they cannot otherwise process or express.
The evidence also pointed to selective difficulties with impulse control and decision-making under emotional pressure, though researchers were careful to avoid overstating these findings. The review found no support for the idea that adolescents who self-harm are globally impaired in thinking or reasoning. Instead, problems with inhibitory control and short-term decision-making appeared most relevant when teenagers were already in a state of acute distress.
Social and interpersonal factors also emerged as potentially important, though the evidence here was considered less direct. Teenagers with heightened sensitivity to rejection, those who experienced family relationships as emotionally invalidating, or those who felt their distress was unlikely to be understood by others appeared to be at greater risk. The researchers noted that self-harm may sometimes carry an interpersonal meaning, even when its primary function appears to be internal regulation.
The findings have practical implications for how clinicians assess and support young people presenting with self-harm. A purely descriptive approach that records frequency and method without exploring the underlying emotional and cognitive processes may miss the most clinically important information. Treatments such as Dialectical Behaviour Therapy for Adolescents and Mentalization-Based Treatment for Adolescents were highlighted as consistent with the framework, precisely because they address emotional regulation, impulse control and interpersonal meaning alongside the behaviour itself.
The review was authored by Georgios Giannakopoulos of the National and Kapodistrian University of Athens and was designed as a narrative synthesis rather than a systematic review. The author acknowledged that much of the recent research in this area has been conducted in Chinese adolescent samples, which may affect how broadly the findings can be applied across different cultural contexts.
The research concludes that self-harm in adolescence is best understood not as a single cognitive failure but as the result of interacting emotional, behavioural and interpersonal processes that unfold during a particularly vulnerable period of development. Clinicians are encouraged to treat self-harming teenagers not as globally impaired, but as young people whose still-developing capacities for emotional understanding and behavioural regulation are being stretched beyond their current limits.
New research finds adolescent self-harm is strongly linked to emotional processing difficulties rather than broad cognitive impairment.
