Add: The blister question has the tag "personal care". Obviously, personal care will overlap with seemingly medical advice. Fixing a blister and what's the best way is superficial medicine, if anything, such as anything else skin related, and we are not going to put all skin questions out of scope, are we? Does how best to shave also represent medicine?
After reading this thread I definitely want to go find the original question and read what the answer is. Having common sense I can decide for myself whether any improper medical advise is represented. So I think the question should be returned to the inventory.