I don't think so when you get hit by the boss you can use soup to heal, but if you want to do Archivements it's a bit difficult for you
I know there's healing on the form of shop items like the soup, but the problem arises when I'm trying to gain distance to heal after getting hit only to get hit with an attack that started off-screen, which is especially prevalent in the skunk boss fight, leading to the heal being interrupted and needing to repeat the process over again.