Resources. Huntington's disease is a genetic disorder or hereditary disease that causes progressive deterioration of brain cells or neurons. The disease develops due to mutations. Huntington's disease HD is an inherited disease caused by a mutation in the huntingtin gene. The mutated gene codes for a defective protein, leading to brain changes that lead to loss of mental and physical functions and death. There is currently no cure or way to slow or stop these brain changes. Stay social and engage in hobbies to reduce stress. Break down difficult tasks into manageable steps. Create a peaceful, structured living environment that limits uncertainties. Avoid family conflicts, fights and other stressors. 5. Natural supplementation. Matt Ellison was seven years old when his father was diagnosed with Huntington's disease. The condition - which is progressive, incurable and invariably fatal - takes years to kill John Ellison.