I have been using lemons over a year on and off and currently I have stopped using it. Partly because I don't want to get anymore lighter on my face.
I think the best way to use it, is before going to bed and using it as a toner with a cotton wool. I never rinsed it off though until the following morning.
I am starting to wonder if lemons have been the cause of my cystic acne as I never used to have them before. But that's probably because I never rinsed it off.
Overall, I suppose I've taken what the juice has done for me for granted over the period when my skin was really bad (as I am my own cause of self picking) and it seemed to be the best remedy on giving me back my skin again and also at times given me a lovely satin healthy glow.
I've stopped using it because I'm worried it has been the cause of my cystic acne, a sort of a 'catch 22' situation.
Lemons are ideal for evening out the overall complexion and tone. But I can't remember if it decreased or increased my spots as recently my skin is looking good just using Clean&Clear blackhead scrub.