Constant, continual regurges are the quickest way to kill the snake!
It keeps depleting the animal's acidic/enzyme balance and just makes things worse fast!
This can be caused by any number of things really, but it could be amoebic in nature, and would probably benefit greatly with a dose of Flagyl(Metronidazole) given at 50 mg/kg of body weight(repeated in 14 days), But I'd recommend it be done by a good reptile vet, and SOON!
It can EASILY pull through this if you get it to a vet soon, and not too much time has already lapsed, if not,....the snake is probably doomed.
I've administered this to some of my own snakes in the past that were regurging, and it was stopped right in it's tracks!
but don't guess anymore about it, do the right thing, and get the animal to a vet.......FAST!
good luck! ~Doug

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"Better to be silent and thought a fool, than to open mouth and remove any doubt!"