What she is describing to you is what your supposed to do for pus filled absesses. The absess will become septic and eventually lead to death.

When you lance it, you squeeze out the pus, and do exactly like she said with saline, you wash it out. Sometimes you have to do this a couple times a day, just to keep the absess clean and pus free.

He will most likely need to be on antibiotics to fight off the infection, and kept warm with plenty of water and minimal handling....

If you find a vet that can help you, I would do that as well.