Hi,
I'm sure I've read on here about people who have put Efudix on their lips. One person wrote about their lips sticking together and drinking with a straw.
Don't want to put you off as Efudix does a great job and any pain is worthwhile.
I've found Efudix always spreads further than you mean it to. So those doing their lips must have got it in their mouths.
If your doctor has told you not to put it on your lips I wouldn't be keen to ignore it although I might go back and ask if I need to and if in your case it's a problem.
Pete