If you have been injured because of someone else's negligence, you have reasonable grounds for a personal injury case. The question then becomes, is it worth acting on, and if so, what type of action.
If your injury did not require a visit to the doctor, and healed on its own in a few days, it may not be worth your time to act.
If your injury was more significant, and required you to miss work, or schedule an appointment with your doctor, then acting makes sense. For small claims where the loss was hundreds of dollars, handling the matter on your own usually makes the most sense.
When your injury has made a substantial impact on your life, not only do you likely have a claim, but you should also consider seeking the counsel of an experienced injury attorney.
Conversely, handling your own case puts you in total control. And, if you can achieve the results that an attorney could, you could hang onto the money that would have otherwise gone to your attorney.