The person would be expressing ideas that someone is trying to harm them, plotting against them or talking about them or something similar. Their feelings and thoughts will be very real to them but will be far from reality as is psychosis.
The person can present as a danger as they may feel they have to defend themselves as their perecived ideas are real to them.
Wendigo or Windigo psychosis is an often disputed mental disorder in which a person has a craving for human flesh. Symptoms include depression, distaste for regular diet, nausea, and vomiting.
When a person believes bizzare things, which is irrational for most normal people, when a person sees or hears things, which is not experienced by most normal people, when a person behaves abnormally the person is considered to be having psychosis.
Organic psychosis occurs where a person experiences psychotic symptoms in the context of an organic (physical) health problem. Symptoms of psychosis include hallucinations, delusions, formal thought disorder, anhedonia, apathy, avolition, amotivation. Organic problems that can cause psychosis are varied, and include brain tumours, viral infections, traumatic brain injury, and genetic disorders. Psychotic symptoms can also arise in the course of dementia, and also may be present when a person is experiencing delirium.
This can be a symptom of several mental disorders, but itself is not a mental disorder.This delusion is one type of of "paranoid" symptoms (i.e. that you are the cause of everything - in this case everything bad) and is common in depressive psychosis (clinical depression with psychotic features). But such delusions also occur in other mental disorders having psychotic features (e.g. paranoid schizophrenia).I have Bipolar Disorder and although I have never had depressive psychosis in any of my episodes, I have had a related paranoid delusion that it was my responsibility (and I somehow had special abilities needed) to fix everything bad when I was in a manic psychosis. I did not think I caused them, just that I had to fix all of them.
Mental illness is both conscious and unconscious. A person who is experiencing psychosis is typically living in an altered state of reality. A person with multiple personality disorder and schizophrenia is living in and out of a state of reality consciousness. But even a person living in a psychosis may not be aware of their illness. The symptoms are never as clear as physical illness.
Psychosis involving delusions and illogical thinking is a mental health condition characterized by a disconnection from reality, where individuals may hold false beliefs (delusions) that are resistant to reason or contrary evidence. This can include paranoid thoughts, grandiosity, or other irrational ideas. The illogical thinking may manifest in disorganized speech or behavior, making it difficult for the person to communicate effectively or function in daily life. Conditions such as schizophrenia and severe mood disorders can include these symptoms.
Patients in this category have the characteristic positive and negative symptoms of schizophrenia but do not meet the specific criteria for the paranoid, disorganized, or catatonic subtypes.It is a type of schizophrenia where the person has both/either negative and positive schizophrenic symptoms but do not strongly enough fit the criteria for paranoid, disorganized or catatonic schizophrenia to be classfied as such.
Person suffering from unwarranted jealousy. Example: he is so paranoid.
Preexisting psychosis means that the psychosis was already present before another factor became involved in altering the person's mental health status. It is hard to comment directly without more information, but here is an example. A person might have psychosis already as a late teenager. He might then go on and use drugs and this makes the psychosis worse. The mental health worker might say something like "The young person appears to have had a preexisting psychosis that has been exacerbated by substance use". It would most typically be stated in this way when the mental health worker provides an opinion about whether the psychotic symptoms came first (and in their own right), or whether they emerged as a result of something else. This is important when making a correct diagnosis, as it can distinguish between (for example) schizophrenia versus substance-induced psychotic disorder.
Anger and irritability are often associated with violence. When a person is feeling angry or irritable, they may be more likely to act aggressively or violently towards others.
Substances that can induce psychosis include various illicit drugs such as cocaine, methamphetamine, and hallucinogens like LSD and psilocybin. Alcohol and withdrawal from it can also lead to psychotic symptoms. Additionally, prescription medications, particularly certain antidepressants and corticosteroids, can trigger psychosis in some individuals. It's important to note that underlying mental health conditions may also play a role in how these substances affect a person.
One can know if the person has the following symptoms, extreme worry or restlessness, anxiety or nausa, headaches, extreme fear of a coming or past event.