Unusual or strange behavior involves performing actions that are not normal for the person.
Unusual or strange behavior may include:
There are many causes of unusual or strange behavior, including medical and psychiatric illnesses. Two of the more common medical causes are:
Psychiatric illnesses that are often associated with unusual or strange behavior include:
Possible causes of strange behavior in older people include:
Possible causes in people of all ages include:
A doctor should evaluate any unusual behaviors or personality changes. Treatments are based on the following causes of strange behavior:
Schedule an appointment with your regular health care provider or a doctor who treats disorders of the nervous system (neurologist) if:
The health care provider will perform a physical examination and will take a medical history. The physical examination will probably include a detailed evaluation of the nervous system (neurological evaluation).
Medical history questions may include:
The following tests may be performed:
Inouye SK. Delirium and other mental status problems in the older patient. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier;2007:chap 26.
Knopman DS. Alzheimer's disease and other dementias. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier;2007:chap 425.
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