keratosis
"Actinic keratosis lesions on forearms only ... but a nasty case at any rate.
Dermatologist put me on a regimen of Aldara cream and Salicylic Acid. The experience during the 4 months of Aldara treatment was not particularly pleasant: worst of all being that it made the Keratosis lesions much worse in terms of acute redness and inflamation and quite distressing vanity-wise. There was some headaches, some fatigue, but that only lasted 2 weeks or so. After that, no side affects worth bothering about. But I must admit I almost stopped using it during the period of unsightliness. But I didn't. 
And I am very glad I didn't!  The Dermatologist took me off the Aldara regimen after 4 months and told me to just keep on using the salicylic acid. Now, after 5 months the Keratosis lesions are completely gone, leaving quite smooth new skin. The area is still a little pinkish compared to normal sin colour, but Doctor said that that will disappear once the healing time has done it's work.
Over all success I would say. For myself Aldara was a godsend."