The SSA has a very strict definition for the term “disability”. As a result, not all medical conditions and injuries fall under the definition they have set. Specific conditions and injuries covered by the SSA can be found in their “Blue Book”, which can be found on their website.
Despite the strict nature of the SSA, they are open to allowing several exemptions and approving a disability Social Security application. For example, migraines aren’t a condition listed in the “Blue Book”, but if they are severe enough that it prevents a person from working a normal job, the SSA may decide to cover the condition anyway.