Inn the meantime fill a clean bucket filled with hot water and two large tablespoons of salt well dissolved get a clean hand towel and immerse
in the bucket then gently squeeze out and making sure its not too hot place it on your
dogs abscess until it cools down then repeat this should bring it too a head and hopefully release the pus inside, never squeeze the abscess.
This is not advised if you can get to a VET, it can be risky .The antibiotics are important too......