Aww poor Vegas, it is a really horrible thing, infected lip folds.
Cleo had surgery on her lip folds on both sides. Hers was a recurring problem.
The surgey wasnt very invasive, and she was eating properly that night. It seemed to heal in less than a week. Never any problems since. It is odd though, as Livvy isnt troubled by this problem. You'd think with them being litter mates, that theyd be prone to the same kind of thing.
I think it would be better to get it done once and for all, rather than an almost constant supply of antibiotics and treatments, which is what was happening with Cleo. But thats just my opinion, and I'd hate to upset anyone.
Good luck whatever course of action you follow.