"Delusion" means that the patient is suspicious and worried all day long, making random reasoning and judgment, and experiencing disordered thinking, which is an important symptom of mental illness. Patients may experience hallucinations but no other obvious mental symptoms, Du Zhong said.
"Persecutory delusions" are the fear of spontaneous combustion when taking the bus, the fantasy of falling and breaking teeth when going up the stairs, the suspicion of being followed when walking at night, the fear of being robbed and killed when traveling, I said.