Elbow Is Very Swollen What Do You Do When Your Dog Has A Spider Bite On Their Elbow And Its Swollen?

What do you do when your dog has a spider bite on their elbow and its swollen? - elbow is very swollen

I do not have enough money for the vet right away, but my dog behaves as it does not touch it. Someone told me that the leak, but I'll try to get a second opinion.