Failing to appeal! More than half of the people whose applications are denied fail to appeal. Many people who are denied on reconsideration fail to request a hearing.
Another mistake, although much less common, is made by people who fail to obtain appropriate medical care. Some people with long-term chronic medical problems feel that they have not been helped much by doctors. Thus, for the most part, they stop going for treatment. This is a mistake for both medical and legal reasons. First, no one needs good medical care more than those with chronic medical problems. Second, medical treatment records provide the most important evidence of disability in a Social Security case.