You cannot be fired after returning from leave because you had an accident or because you used leave which the company approved you to take (or to which you were entitled to under law, such as under the Family and Medical Leave Act). However, you could be fired for independent reasons (such as a downsizing or restructuring, legitimate performance issues, etc.); if you exceeded the amount of leave you are allowed to take (in which case you would be fired for unauthorized absenteeism); or if you cannot, upon your return, do the job you were hired to do.If you are fired and feel it's retaliation for having used leave or for having been injured on the job, speak with with an unemployment law attorney about your options.