Mental Health

Personality Disorders

Lesson 9

A personality disorder can make you feel, think and behave differently to most people. And when your feelings are irrational and distressing, it can be become a serious problem.


There are many types of the condition, but the most common is borderline personality disorder.

Here are the main symptoms:

  • Highly changeable mood
  • Extreme reactions to feeling abandoned
  • Unstable relationships
  • Confused feelings about who you are
  • Being impulsive and reckless
  • Self-harming, suicidal threats or behaviour
  • Anger
  • Paranoid thoughts


There are many kinds of therapies - mostly long term - to help you recognise the causes, manage the symptoms and control your emotions and behaviour.

There's no recommended medication, but your GP may prescribe something to deal with symptoms such as anxiety or depression.

If you have any symptoms described on this page, it's a good idea to talk to your GP.