OK, here goes, may be good info, may be worthless.
My dad was a Judo expert in the 30s while stationed in Hawaii. He said his oriental instructor could make the worst bruise disappear by deep massaging it with oil. Fast forward 60 years and dad is bitten by a brown recluse. He said he used the same oil/ deep massaging technique on the bite over and over during the day and cleared it up with no tissue damage, much to the amazement of his doctors.
Dad said the massaging forced blood through the damaged tissue and prevented necrosis.