In contemporary times, there are two broad and related disciplines that treat abnormal behavior, clinical psychology and psychiatry. The field of Clinical Psychology attempts to understand the reasons for the existence of abnormal behavior and treat it through different kinds of psychotherapies and counseling. Also, besides treating abnormal behavior the focus is on promoting personal growth and well-being.
The clinical psychologist also uses a wide variety of psychological tests and questionnaires to understand the personality of any individual in a better manner.
Psychiatry is a branch of medicine that deals with diagnosis and treatment of abnormal behavior through medication and other modalities. Depending upon the disorder being treated the treatment maybe inpatient or outpatient. Both approaches play a complementary role in alleviation of abnormal behavior.