I have used Efudix 4 times -face and neck. My doctor divided my face into 4 plus my chest. I have been doing it once a year - about to do last face section and redo chest . We have so much skin cancer in my family I really have to do it. It is very , very uncomfortable and I look a sight while doing it but friends and family are used to it now! I go for a solid 4 weeks of treatment - my doctor would like me to alternate weeks with one week on, one week off but it would last for so long!
BUT - the results are fantastic! I have lovely , clear skin on the areas I have done on my face. My chest was not so successful so will repeat soon. Because my treatment was not so urgent I chose months when I wasn't planning on doing much and the weather was cool- I wouldn't like to do it in hot weather! So.... my advice is to try and do it. The results , for me, are amazing! There's lots on the internet- diaries, photos etc. Good luck!