Purple ribbons are worn to show support for Alzheimer&#39;s disease, Fibromyalgia, Chronic Pain, Crohn&#39;s Disease, Domestic Violence victims, ADHD, Lupus, Pancreatic, Emotional Abuse, Retinitis Pigmentosa, Sjogren&#39;s Syndrome, Arnold-Chiari Malformation and Cystic Fibrosis.