I advise anyone with domestic burns to apply honey, which they are likely to have to hand. I can swear by its efficacy on the two occasions I've (stupidly) picked up very hot pieces of metal - I did the whole cold water thing first, but I've done that before - the pain reduction and practical absence of blistering is down to the honey. Curiously, that was an Old Husband's Tale (I was speaking to my dad on the phone the first time, it was his wisdom).
The point is I just practised medicine without a license, and the only person I've ever seriously injured was myself. Was he passing himself off as a medical doctor? I don't believe so. More to the point, I was responding to what you actually said:
""Cancer is a crab?" I hope this guy did time for this. "
For that? Oh, no, for something else - which he probably isn't guilty of. In the UK, I understand that you can sue an expert for negligent advice, but civil cases don't incur prison punishments. In the US, I understand that you can sue anyone for anything, but that's still civil law and financial recompense. I don't think you could even get get him for ABH or GBH in the UK, she applied the unguent herself. Maybe she'll wander into one of those smart prisons for the stupid.