id author title date pages extension mime words sentences flesch summary cache txt en-wikipedia-org-7275 Anxiety - Wikipedia .html text/html 9838 1478 59 In Art and Artist (1932), the psychologist Otto Rank wrote that the psychological trauma of birth was the pre-eminent human symbol of existential anxiety and encompasses the creative person's simultaneous fear of – and desire for – separation, individuation, and differentiation.[citation needed] Anxiety disorders are caused by a complex combination of genetic and environmental factors.[52] [53]To be diagnosed, symptoms typically need to be present for at least six months, be more than would be expected for the situation, and decrease a person's ability to function in their daily lives.[citation needed] Other problems that may result in similar symptoms include hyperthyroidism, heart disease, caffeine, alcohol, or cannabis use, and withdrawal from certain drugs, among others.[citation needed] ./cache/en-wikipedia-org-7275.html ./txt/en-wikipedia-org-7275.txt