The typical symptoms of schizophrenia include two major groups of symptoms, including positive symptoms as well as negative symptoms, as follows: First, positive symptoms include hallucinations, delusions, disorganized thinking, and abnormalities in behavior and thought. Hallucination is the patient seeing, hearing, smelling, tasting, or feeling something that does not exist, the most common being hallucinations. An illusion is a false perception of a sensation, such as seeing the shadow of a tree or a person, etc. Disorganized thinking means that the person’s thoughts and conversations are difficult for those around them to catch, that the person has difficulty concentrating, that the person jumps from one idea to another, and that thoughts and words become confused and difficult for others to understand. Positive symptoms also include behavioral abnormalities, where the patient’s behavior becomes disorganized and can be violently aggressive, with behavior and appearance becoming very unusual to others. Second, negative symptoms include emotional indifference, poor thinking, reduced activity, lack of interaction with others, and a significant loss of intimacy with loved ones.