Question:medium

A 16 year old girl was brought to the psychiatric emergency after she slashed her wrists in a suicide attempt. On enquiry, her father revealed that she had made several such wrist-slashing attempts in the past, mostly in response to trivial fights at home. She also has marked mood fluctuations with a pervasive pattern of unstable interpersonal relationships. What is the most probable diagnosis?

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Repeated impulsive self-harm plus unstable mood and relationships in a teenager points to borderline personality disorder.
Updated On: Jul 8, 2026
  • Borderline personality disorder
  • Major depression
  • Histrionic personality disorder
  • Adjustment disorder
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The Correct Option is A

Solution and Explanation

A 16 year old girl has cut her wrists more than once, often after small fights at home, and also shows big mood swings and a long pattern of rocky relationships. The question asks which diagnosis fits this picture best.

  1. Borderline personality disorder: Marked by repeated impulsive self-harm, sharp mood swings, and a lasting pattern of unstable relationships, which is exactly what is described here.
  2. Major depression: Usually causes a suicide attempt during a low mood episode, but does not by itself explain a repeated pattern of self-harm set off by minor quarrels, or ongoing relationship instability.
  3. Histrionic personality disorder: Centres on being overly dramatic and craving attention, not on repeated cutting behaviour and unstable relationships.
  4. Adjustment disorder: A reaction limited to one clear stressor over a short time, not a long repeating pattern seen across many episodes.

The repeated wrist-slashing tied to trivial conflicts, along with mood instability and unstable relationships that run through her life, are the hallmark triad of borderline personality disorder.

Let's summarize:

  • Recurrent impulsive self-harm is a core feature of borderline personality disorder.
  • Unstable mood and unstable relationships that persist over time support this diagnosis over a single depressive episode.
  • Histrionic personality disorder and adjustment disorder do not match the repeated self-harm pattern described.

So the correct answer is borderline personality disorder.

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