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You know, it's unfortunate that someone can't come along and ask for help without being accused of being a troll or told to put a shirt on or told not to hold him this way or that, the pig won't live another day, etc. If you don't know what to do, that's one thing, say that.
@leebaldwin, you definitely need to get him to the vet asap. If you want to do something at home before getting him to a vet I'd give him a warm water soak with chlorhexidine (diluted) or betadine. Do not try to force anything off or mess with that mass too much. You may end up with bleeding you can't control.
But, DO get him to an exotics vet tomorrow. He will need antibiotics and possibly even surgery to clean it up and drain any abscesses that might be there. If so that will require flushing and packing daily until it heals up.
Do keep us posted on the poor little guy!