This article is a clinical case study based on an experience report, with the aim of reporting the experience of interventional psychodiagnosis with an individual with symptoms of heteroaggression and intrusive thoughts. The case study methodology was based on the experience of the Basic Supervised Internship in Psychology and Assessment and Diagnosis Processes, the procedures performed were: reception, observation, listening, psychological interview (semi-structured), psychological testing - HTP Test (Home - tree - person), for personality assessment, STAXI - 2 (Anger Expression Inventory as State and Trait), for assessment of anger expression and feedback interview. It is concluded that the interventional psychodiagnostic process resulted in an improvement in the symptoms, providing, from the operations, that facilitated the expression of feelings and emotions, allowing reflection, self-perception and awareness of invasive thoughts and heteroaggression, enabling access to difficulties experienced and thus mobilize psychic resources for the change stage.