Definition: Vitaliser is a term used in medicine and psychology to describe an individual who has lost control of their emotions or behavior due to trauma, stress, or other negative experiences. It can refer to any person experiencing emotional distress or difficulty with their emotions, whether it be from a traumatic event, a relationship breakdown, or other personal challenges. In the context of critical thinking, vitaliser refers to someone who is able to identify and understand the cause of an issue or problem in order to find a solution