Generally as long as you have a long standing medical history documenting your pain issues then obtaining a medical card in Arizona is not hard. I have been a long term headache sufferer for years (going on 5 and a half years with the same headache now non stop). I have several neurologists that backed up my pain issue with documentation for years (been seeing them since the initial headache had not gone away after a month or so when they switched from often to non stop).