Eventually, however, a lump or external abscess will form, containing pus and inflammatory fluids. If left long enough the abscess will burst, releasing the pus and then will finally allow the skin to heal over. Please put on the medical gloves. If you know where your cat has been clawed or bitten, begin by removing some of the fur in that area, either by using a clipper or a small pair of scissors. Just be careful, as this area may be sensitive to your cat's sense of touch.
Abscesses are often more painful than a regular cut, as they are inflamed below the skin's surface.
If there is a scab that has formed, gently soak it with warm water and hydrogen peroxide. Pick off as much residue as your cat will allow. Once any scabs have been removed, or should you see a small opening, gently squeeze the area. Be certain not to force the abscess open, gentle pressure should be enough. If some liquid and pus does come out, try to squeeze out as much as possible.