The Diagnostic and Statistical Manual of Mental Disorders, DSM-5, identifies 10 unique personality disorders, each belonging to one of three groups known as "clusters." Cluster A contains paranoid, ...

Cluster C personality disorders are a group of mental health conditions that cause intense fearfulness, insecurity, or perfectionism. The symptoms are long-term and impact many aspects of life.

Stress and hormonal factors can cause your OCD symptoms to become more severe. With the right treatment, obsessive-compulsive disorder (OCD) can become more manageable over time. But certain factors ...