In the more extreme dementia types, a person with dementia might also experience very intense emotional swings – he/she might become very anxious, irritable, apathetic or upset for no apparent reason. Some people might even experience visual hallucinations and delusions.
Dementia is a progressive disease, meaning that the symptoms in most cases get worse over time. The speed of the worsening differs from person to person. As dementia develops, the person might feel different to his family and friends, and start to behave in strange and unusual ways. Common behaviors include asking the same question again and again, feeling very anxious, restless or agitated.
In the later stages of dementia, a person might have physical symptoms like lack of sleep, weakness in the muscles and weight loss.