Hallucinations are a more serious cognitive disorder, an illusory feeling, but they are not illusory to the patient who is hallucinating, but vivid and realistic, and can cause anger, sadness, panic, avoidance, and even emotional or behavioral reactions to attack others. Attempts to convince the hallucinating patient not to believe the hallucination are sometimes futile. Risk factors for hallucinations in patients with Parkinson’s disease include anti-Parkinsonian medication, cognitive impairment, severity of the disease, visual impairment, comorbid depression, and anxiety. The content of the hallucination may be a human figure, an animal or an object, and can be more vivid or blurred or distorted. When hallucinations occur, family members must watch over the patient, and it is best to bring the patient to the hospital quickly to take appropriate treatment. Sometimes trying to tell the patient that the person or object they are seeing does not exist and is a hallucination does not convince the patient and perhaps may cause an argument and increase the patient’s pain. When the patient tells his family that he saw some people or things that really do not exist, observe the patient’s emotions when he sees these sights, whether it is anxiety, fear, or something else, to first subtly reassure the patient’s emotions, do not just convince him that there is no person, no animal, he saw a hallucination, etc., hallucinations are realistic for the patient, but also may play a counterproductive role and increase the patient’s anxiety and fear. If the patient does not say what he sees, but there is some abnormal behavior, for example, always walking to a certain place, always looking at a place, always talking to himself at a place, etc., there is abnormal behavior, try to talk to the patient and patiently listen to what he sees. If the patient is violent, some dangerous objects, such as scissors, may hurt the patient or others, so it is important to comfort the patient, listen to the patient patiently, and try to calm the patient down. Some patients may also go to his hallucinations, sometimes walking out in the middle of the night, which is also very dangerous, so it is important to strengthen the supervision of the patient and take him to the doctor as soon as possible.