Symptoms. The signs and symptoms of Huntington’s disease are at first subtle. They usually begin when the person is in early middle age, but infants have been known to show symptoms. They are subtle and are seen as changes in the person’s behavior, their ability to learn and understand and their physical abilities. Physical symptoms are jerky, chaotic movements that the patient can’t control. Sometimes the person simply seems clumsy, out of balance or restless. Their eyes may move about in an abnormal way. As the disease progresses, the person takes up abnormal poses, can grow rigid or writhe about. Eventually, they will take on strange facial expressions and have difficulty swallowing and chewing, sometimes to the point where they can’t eat properly and suffer malnutrition. They begin to lose their memory, and have depression and anxiety even as they lose impulse control.