What Can Cause Irrational Behavior?

What Can Cause Irrational Behavior? Anxiety disorders such as obsessive compulsive disorder and post-traumatic stress disorder. Borderline personality disorder (condition characterized by unstable relationships) Dementia (including Alzheimer’s disease) Schizophrenia. What are signs of unusual behavior? weak pulse. clammy skin. rapid heart rate. rapid breathing. shallow breathing. low blood pressure. confusion. dizziness. What can cause unusual