Key points Borderline personality disorder (BPD) is a relatively common problem, often difficult to treat. Because there are hundreds of possible symptom combinations, a system for classifying BPD is ...

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 ...

Comorbidity is when a person has more than one health condition at once. Researchers investigating the comorbidity of personality disorders have found people with certain disorders may have other ...

Credit: Getty Images Some rare psychological disorders may occur so infrequently that most mental health professionals might never encounter them. Approximately 1 of every 5 adults in the United ...

Psychiatric disorders are mental health conditions that significantly impact how you think, feel, and behave. They can cause major disruptions in daily life and may require professional treatment.

People with borderline personality disorder may experience higher levels of immune system inflammation that relate to ...