If you've been injured due to someone else's negligence or mistake, you may be thinking of filing a personal injury case to collect funds to cover the damages. You'll need to find a good lawyer, compile your evidence, and go before a judge to have your case heard. If you have a strong case and the judge sides with you, then you'll be awarded some or all of the money you've asked for.
If you have worked for a company that employs enough people to require workers compensation insurance, then you have a legal right to compensation if you are injured at work. While this is true, the filing process can be difficult for some. If you have tried to file for workers compensation and have recently received a rejection on your claim, then you should know that you can appeal this decision. This requires you to go through an administrative hearing.