In evaluating your disability claim, the Social Security Administration (SSA) will first consider whether you can't handle the physical and mental demands of your past work. If you worked a job requiring physical labor, and you now have limitations that prevent you from doing such strenuous labor, you have a pretty good chance of Social Security agreeing you can't work. Social Security will then consider whether you could work if you changed occupations. If you worked a job that didn't give you job skills you could use at another, perhaps less strenuous type of job, you may have a good chance of getting disability benefits, especially if you're older. Armed with information about how your past work is classified, you should have an easier time winning disability benefits -- if your medical condition makes it impossible for you to continue to work.