![]() They often last for several minutes and happen often. Visual hallucinations are more common in people with dementia with Lewy bodies, and often take the form of complex, vivid and very realistic hallucinations of people or animals. gustatory hallucinations – tasting things that aren’t there, such as a metallic taste in their mouth.tactile hallucinations – physically feeling things that aren’t there, such as being kissed or insects crawling over their skin.olfactory hallucinations – smelling things that aren’t there, such as smoke or perfume.auditory hallucinations – hearing things that aren’t there, like voices or footsteps.Some people with dementia will have hallucinations in different senses – for example: How does a person experience hallucinations? Some people with worsening vision start to see things that aren’t there (visual hallucinations) because of their deteriorating sight and not from any other condition, such as dementia or a mental health problem. Speak to your GP before making any changes to medication. The drugs for Parkinson’s disease can often trigger hallucinations. Hallucinations are a rare side effect of many medications. Some people with delirium will have hallucinations. Diseases that cause inflammation and infection, such as pneumonia, can interfere with brain function and cause delirium. Hallucinations can also be caused by physical illness including fever, seizure, stroke, migraine and infection. People with Alzheimer’s disease can also have hallucinations. They are more common in people with dementia with Lewy bodies and Parkinson’s disease dementia. Visual hallucinations are usually caused by damage to the brain. ![]() People with dementia are often thought to be hallucinating when in fact they are simply mistaken about what they have seen (see Misperceptions and misidentifications, and dementia ). They can be simple (for example, seeing flashing lights) or complex (for example, seeing animals, people or strange situations). Visual hallucinations (seeing things that aren't there) are the most common type experienced by people with dementia. A hallucination is an experience of something that is not really there.
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