The affected portions of the brain decay slowly. This leads to increasing chorea and loss of mental abilities. Eventually, abnormal movements and dementia become so severe that the person can no longer care for his or her self. At present, there is no cure. The aim is to treat symptoms and support and protect the patient.
Drugs can control the chorea somewhat, but benefits are often outweighed by the side effects.
Caretakers must see to the person's basic needs. These include hygiene, skin care, bowel and bladder care, and feeding. One must stay alert for suicide attempts. The person's family often needs emotional support. Caring for the person at home is often beyond the family's capacity.