I've been using 100% concentrated lemon juice straight for a lemon for blackheads on my nose for three days. Let me tell you, for blackheads, this is a godsend. I've tried squeezing out the blackheads since using this and there is 90% less to squeeze. I hope it is actually doing what it looks like it is doing. A warning though; this stuff stings. I have dry skin on my nose and it irritated it, especially the first few times I used it.
Since it worked so well on my nose, yesterday I tried using all over my face, for whiteheads and scars and general discoloring of my face. I woke up today and I have broken out all over. I have about 6 or 7 whiteheads all over my face and some redness too. I haven't changed anything in the regime so I think it must be the lemon. I will give the lemon a rest and maybe try diluting it in the future.
A very cheap alternative to blackhead scrubs though, I must say.
Lemons are great for lightening your hair!
I decided to give lemon juice a try to see if it would help fade my acne marks. This stuff seriously works. I squeeze the juice from a lemon and put it in a small container, then every night after washing my face I take a q tip, dip it into the juice, and dab it on the marks. Over a week I noticed that they were less red! It can burn and itch initially after putting it on but it's bearable and goes away in 30 seconds to 2 minutes. I haven't had any flaking or dry spots due to using the juice either, but that's just how my skin is. Overall I really recommend lemon juice as a topical treatment.
I love lemon juice!!! In order to minimize the dryness, i use laneige water bank after using it.
LEMON JUICE AND PHOTOTOXICITY?
I have recently researched for claims on whether lemons are phototoxic or not because I have been using lemon juice as a part of my skin care regimen for the last month. I have found many many online articles, countless, claiming that lemons are phototoxic-- therefore, increasing your skin sensitivity to sun light; however, none of these articles have cited any scientific resources that are in line with their claims.
After searching through the net through google AS WELL AS SCHOLARLY, SCIENTIFIC DATABASES, the only CREDIBLE article on lemon juice I found states,
"In a prior study we demonstrated in rats that only the peel juice and not the fruit juice of lemons is associated with phytophotodermatitis , confirming a previous study in humans ."
This article is published in these two places if you want to read for yourself:
My conclusion from my research is that some lemon oil-- depending on how it is extracted from the peel-- can be phototoxic. Lemon juice, however, I think is fairly safe for now, but I don't know how easily it is for lemon peel juice to get into the lemon juice. And who knows what new studies scholars will come up with.
Always use anything with caution. And try to constantly update your own knowledge by researching OUTSIDE of google.
 If anyone has more information with sources, especially ones that contradict mine, please share!
MY EXPERIENCE WITH LEMON JUICE
I am 25 and have been on the birth control pill since 18-- which is probably why I have very very mild acne. My skin has always been good enough for me to never have to wear makeup, but I don't have perfect skin either. I have an oily t zone, but normal cheeks.
After coming back from two weeks in Hawaii, my forehead broke out in a lot of tiny skin colored bumps. Could be the exponentially increased use of sun screen. Could be sun damage. Could be the weather. Could be that I pigged out on every imaginable unhealthy food I could get my hands on while on vacay. Who knows.
My regular skin care wasn't working: exfoliate with brown rice flour, tone with witch hazel, moisturize with argan oil, and use spot treatment from Clean & Clear. So I decided to add lemon juice squeezed from home grown lemons. Mixed the juice with my rice flour and exfoliated. Mixed juice with witch hazel and toned. Then washed it off and toned AGAIN with witch hazel to get rid of excess lemon juice. I never leave it on for more than a minute. I do this twice a day, morning and night.
After 3 days, the bumps were almost all gone. After 7 days they were all gone. Now my skin is back to normal, and I have been using lemon juice since then.
With that said, lemon juice is not going to work for everyone. Putting anything that is not naturally found on your skin will have the potential to irritate it. This is my own experience, but just because I love lemon juice does not mean your skin will.
When I applied freshly squeezed lemon juice to my face, diluted or undiluted, it stung like crazy. It left my face feeling sticky and uncomfortable. I could not tolerate the feeling for too long, and therefore, cannot describe whether lemon juice really does have an effect on acne.
Three days of applying my DIY lemon juice toner left my usually oily skin flaky and dehydrated. Lemon juice is also possibly phototoxic, so using it to fade hyperpigmentation is counter-productive. The damage may not be noticeable right away, but it will creep up on you later on.
Rather use lemons for flavouring fish or chicken. Or pop a slice or two in your drinking water. How about some homemade lemonade or pickles? :p
Lemon does wonders when applied topically; treats breakouts, rids of blackheads, and lightens complexion. It's best to detoxify from the inside out. Squeeze a quarter lemon into your water and leave it in. You may notice some purging, but that's when you know it's working! I swear by it.
I've always thought of using lemon juice on my pimples but never really did until recently, mainly because I've always thought that applying citric acid directly on skin would be too strong and might even burn my skin. But suprisingly it worked really work! I don't use it all the time, only twice a day at most, once in the morning and once at night. The best is that lemons are so affordable and accessible everywhere. To get the most out of it, cut one small slice of lemon each time and use cotton swab to dab the lemon juice onto your skin. After it dries, remember to apply moisturizing cream and also sunscreen if used in the morning. It doesn't work immediately so you must be very patient. But overall it worked decently well in reducing the redness of swollened pimples and brightening skin tone. Try it and see how it works for you! There is nothing to lose.
The progress is really slow so don't get your hopes up easily for just an overnight application or so. I have been using lemon juice for about 3 weeks now to fight my dark spots and acne scars, it really lightens but not actually removing it completely. basically, i just dilute the lemon slices (but not too much, you don't want that citric acid to lose it's effect) then squeeze out the lemon juice and soak it in a cotton bud (i was using cotton balls before but i find it real messy..on my first 3 nights of using it i had pimples in some areas of my face) . Anyway, it's natural to have that sting, a little itchy feeling and mild redness but you'll get use to it. And one more thing, it really dries off your skin so to moisturize, I apply Vitamin E cream from The body shop.
1 big cotton ball + 1 tip of witch hazel + 1 tip of lemon juice = One seriously awesome toner. I was using lemon juice as a spot treatment on dark marks with a q-tip until I realized straight witch hazel as a toner was too drying on me, and I could get the benefits of lemon juice all over my face. A few days ago I started using an exfoliating wash, Neutrogena Rapid Tone Repair moisturizer with SPF 30 which has a form of retinol, plus a 1% salicylic acid treatment, so I'm liable to be flaky. My face is slowly but surely brightening up with these products. And it's soft. : )