A recent review finds that 17% of adult clinical patients are perceived as difficult based on certain physical or psychological conditions.

Where mood disorders can cause temporary or fluctuating changes in mood, personality disorders cause symptoms that remain consistent over time and across a range of situations. For example, bipolar ...

Medically reviewed by Michael MacIntyre, MD Cluster C personality disorders include conditions with anxious and fearful thoughts and behaviors. These are avoidant personality disorder (AVPD), ...

Symptoms of ASPD can start in childhood and may include manipulative and reckless behaviors. ASPD often co-occurs with other mental health conditions, which makes it harder to treat. Up to 31% of ...