In this paper, we focused on the complexity of diagnosis in psychiatry and problems during its communication, and its acceptance / non-acceptance, both by the patient and family members of the patient, which has a significant impact on the success of treatment. It is not uncommon for somatic diseases to be related to mental illness, which due to damage to certain organs requires adequate psychiatric therapy. The treatment process is a joint agreement between the patient, his / her family members and the psychiatrist regarding the explanation of the illness, how to take the medication and the agreement with the patient about the psychotherapy that would suit him / her best. Psychosocial support to the patient(s) is also very important in the treatment of psychiatric patients, because only with such support do we empower sick people, their families and the social environment, and the result is successful treatment and reintegration into everyday life in the community.