It runs in my family.. Generations, even with new relatives I have met some I haven't personally but talk too.. Aunts, cousins, mother etc seems more have issues with it than not. My mom has it not as bad as me I have GAD, panic disorder w agoraphobia . One son has it the other one is cool as a cucumber. My personal belief from learning my family history is that we are genetically prone to develop it. Other factors come into play of course and can contribute. Over 50% of my family members do suffer with some form of it along with depression. We have a huge huge huge family.