As soon as you, the worker, knows or  even suspects that you have a work or job related injury or medical illness, you should immediately report it to your employer. Under the California labor code, within one day (24 hours) after the injury is reported by you (the injured worker), the employer must give you a workers compensation claim form.

This is only the first step in "filing a work comp claim" in San Diego, California.  Waiting to report an injury or illness can cause a delay or denial of workers' compensation benefits, so you should not wait. The sooner you report it, the better.  Evidence is better preserved, and any witness testimony is sill fresh.