Lewy body dementia (LBD) is characterized by the presence of Lewy bodies in the brain. Lewy bodies are abnormal protein clumps that accumulate in the brain's nerve cells, leading to cognitive decline that worsens over time. LBD has two forms: dementia with Lewy bodies and Parkinson's disease dementia. These two forms of dementia are different but related.
Symptoms can include visual hallucinations, non-visual hallucinations, changes in attention, concentration, wakefulness, and alertness, and severe loss of thinking ability. There is no cure for LBD, though there are some ways to manage symptoms.
LBD can cause unpredictable changes in alertness, attention, and concentration from day to day. Sometimes, changes can occur throughout the day. These symptoms can help distinguish LBS from Alzheimer's disease.

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