Q. My cat has a 50 cent size infection on his face, looks like there is puss inside. I don`t know what to do...I can`t afford a vet
A. It could be an abscess from a cat fight. Ideally the cat needs to see a vet to have it drained and cleaned properly and antibiotics started. In the meantime you can try and remove the scab from the bite wound and try and get out as much pus as possible and give it a good clean with salty water several times a day. Put one teaspoon of salt in a pint of boiled water and leave it to cool down.