Psychotherapy is fundamentally a voluntary and corrective relationship between a therapist and a client, aimed at addressing the psychological issues that the client faces. The effectiveness of psychotherapy hinges upon the therapeutic relationship, which is built on trust and confidentiality. There are different types of psychotherapies, including psychodynamic, behaviour therapy, cognitive therapy, humanistic-existential therapies, and alternative therapies, each varying in their methods and emphases, such as self-understanding or action-oriented change. Furthermore, effective therapy involves systematic problem formulation of the client’s issues to direct the treatment process effectively. Rehabilitation of mentally ill individuals is highlighted as essential for fostering their adjustment and improving their quality of life.