The very old remedy for bed sores in elderly patients who can't soak iin a tub and will continually be rolling on them was tincture of benzoin. It helped to dry them up, toughen them up.

If they are open saddle sores that are weeping and burn, soak it a tub with a few handfuls of epsom salts in the water. It helps to take the sting out of them AND it's a great tense muscle reliever. (I buy epsom salts by the truckful.)

I'm sure the pro riders here have other suggestions as well.