The short version, is that this is all fake. Obviously fake. If this man had a legitimate condition that she claimed to 'cure' then he could potentially die from lack of proper medical treatment.
Snake oil at best, intentionally putting people at risk of death at worst.
The truth is if you're looking for a way to detect stuff like this, you probably want to look at something *other* than what the performer wants you to be looking at. That's how sleight of hand works; you're looking elsewhere. Try a forum for magicians.