CBT offers a series of discussion sessions that helps manage negative emotions and problems by understanding how they work and how to change them. As a core specialty, it offers extensive treatment of different mental illnesses: anxiety, depression, post-traumatic stress disorder (PTSD), obsessive-compulsive disorder (OCD), eating disorders, sleep problems, phobias, bipolar disorder, etc. The comprehensive and flexible nature of CBT makes it a favorite for most sessions and can be combined with other treatment modules relative to the patient's needs.