I have just finished 3 weeks of Efudex, and today is day one of no more cream but my face is...

My dermatologist prescribed 1% cortisone cream twice daily. If you are in the US, this is available over the counter There is also a 2% version available by prescription .Some people have used Aquaphor cream or Vaseline also. I am surprised that your doctor didn’t discuss this with you though as the worst days are the 3 days or so following the end of treatment. I suggest you give him a call