Hi @xxEggderxxHey there, I'm having the exact same problem with one of my birds. It is now day 3 since I noticed the bruise and the limping, I've already tried the salt bath, given her aspirin and put antibiotic cream on the affected foot. Please give me some more advice on what else I should do, thanks.

You have found an old thread, it looks like the OP has not been on in a couple of years, but we will be happy to help you.
Can you post some photos of the chicken and the foot?
Tell us little more about what you think may have happened - did she get injured by a predator, get into a fight, unknown cause, etc.
Have you looked at the bottom of the foot to see if there is any cuts or scabs?
General care for bruising would be what you are already doing - soak in epsom salts and giving an aspirin solution for a couple of days for pain. If you haven't done so, restricting her activity would be a good idea, some birds self regulate activity due to pain, but some need to be caged within the run so they will rest and recover.
Look forward to more information and photos! Keep us posted.