I have had a scaly patch on my face, right cheek for sometime and never thought much of it.  it would be itchy, sometime sore and other times scaly and flaky,  if it was I tended to just pick it off thinking it was dryness.  My GP prescribed some moisturiser which did not good really.  

Anyhow the outcome of this was on my last medical review she fast tracked me for skin cancer ! which needless to say was somewhat alarming.

I had my appointment Monday and saw dermatologist who on examination wrote 

1cm erythematous scaly patch right cheek

No sinister features under dermoscopy today

Appears Actinic

Pigmented lesion   NO

Asymmetry  Yes

Irregular Network No

3 or more colours No

Veil/scarring No.

She has given me a prescription for Efudix (Nocte) for four weeks.

says apply once a day, but on reading up it seems is mostly applied twice a day, I am tempted to use twice as I want this cleared up as soon as possible 

Please could someone explain this examination as I have not a clue what it means  ?

Actinic Keratosis, is this not pre-cancerous. 

Just need more information please ? 

Any help much appreciated.