Hi!I have got a few brown marks on my face. Excessive sunbathing when young with a pale and freckly complexion I am afriad! Have tried chemical peels without much (if any) success. Sent off for a tube of Retin A as I had read this might work. As it wasn't prescribed by a doctor not sure how to use it. Should a put it all over (pea sized amount) or should I put it just on the brown patches? Been doing it all over for a couple of days now and my face feels a bit sore and slightly flakey in places. It's obviously strong stuff.

Thanks for any advice.