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WARNING!
I also used to do this - but with lime juice. I would clean my face and neck and then rub the lime juice into my skin. It made my skin very soft and also eliminated age spots and seemed to help with fine lines too.
BUT - be very careful about applying lemon/lime juice or essential oil and then going out into the sun! Usually, if you apply it and leave it overnight - and wash it off the next morning you will be fine. But one time I evidently didn't wash it all off and my skin became very sensitive to the sun and I could tell it was going to burn. Luckily I got out of the sun before it happened - but I have read about people getting very bad sun burns from this - and also having new spots form because of the photo sensitivity that lemon/lime juices causes to skin.
Just make sure you wash it ALL off before going outside!
Lemon Juice
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WARNING!
I am a licensed aesthetician and would like for you to know that while the lemon juice will most definitely fade your pigmentations, you have to be VERY careful that you're not creating new ones in the process. Citric acid is a very strong photosensitizer (that means it makes you sensitive to light) and if you're spending ANY time in the sun with lemon juice on your face (even a couple minutes) you are DRASTICALLY increasing your existing sun damage, freckling, pigmentation spots, and wrinkles. Just make sure to only do this at night, or wear a minimum of SPF 30.
