Dying hair twice in one day...?

Never OK.

Style meets chemistry meets biology: We're talking hair coloring.

Playing with chemicals is not like playing with clothes, or doing a manicure, there are penalties for playing chemicals in the lab. Even hair color experts at the salon are not rocket scientists, they do a bang up dye jobs to their clients or their own hair.

Example: "My hair is right about armpit length as it is, but I've severely damaged it by bleaching it all at once. As a student of cosmetology myself, I would have to say that it was probably one of the worst mistakes I could have ever made."

Another example: ok i did my hair yesterday i DIDN'T bleach it ,but im not sure what its called but she took the color out of my hair and then dies it a blond color and my head was on fire it killed me so after that i hated my hair color so i colored it my self a darker color, it looked so ugly and it burned me again it rully hrt so after i washed it my mom checked it for me and found small spots of blood all over my top scalp like over 20 of em now im scared and don't know why its there is it from the color am i sick and something is wrong ??

Chemicals can enter the body through the skin.

Google: Teen 'feared she would die' after reaction to hair dye

The allergic reaction was caused by a well-known brand of semi-permanent hair dye Chloe used to turn her hair black for a Hallowe’en party. . . . . called for beauty bosses to ban hair dye chemical PPD (para-phenylenediamine) from the shelves. 11-04-11

The chemical is not new and is present in a number of brands of dark hair colours, acting to help adhere the dye to the hair so that it doesn't wash out. It’s made from coal tar and is used in both permanent and semi-permanent hair colours. It’s well-known to be a cause of serious allergic reactions -- including something called contact dermatitis which can lead to rashes, blisters, and open sores.

PPD is sometimes added to black henna tattoos and that using them is not safe. Allergic reactions usually begin within two to 10 days following application. One bad reaction can lead to sensitivities to other products such as hair dye, sunblock and some types of clothing dyes. Oftentimes, it's using the product a second or third time.

Google: A 38-year old mother left in a coma after using hair dye. 11-22-11. SHE DYED HER HAIR MANY TIMES BEFORE, USING THE SAME BRAND.

Permanent black hair dye is linked to causing leukemia and lymphomas.

Google Salon Hair Dye Lawsuits. About 336,000 results (0.17 seconds) Dec. 2011

When it comes to hair care treatments, product use or visits to a salon or spa, the consumer must take responsibility to do their homework and be aware of all the risks involved.

Vanessa Minnillo Lachey: "I dated a guy once who wanted me to have blonde hair. Clearly, he was the wrong guy for me! I went to a lady who bleached my hair and it literally fell out. So, not only did I go back to my natural hair, I broke up with the guy!"

Another example posted on YA! 8-20-12. Is it just me or does xxl live max blonde make your scalp feel like it on fire? I've recently used a max blonde on my hair and I had to wash it wash off straight away because my scalp felt like it was on fire has this happend to anyone else? Should I try again?

One example: MY HAIR DRESSER DYED MY HAIR GREY. I've been crying for the last 2 hours, I want to kill that bish for destroying what was amazing bleach blonde hair. AND to make things worse, she cut my extensions WAY too short.

And one from a hairdresser:

There are spots ( level 8 & very orange) and they will not come off! This was accidental. Not a result from lifting as she has been a client of mine for 3 years. Her formula has never changed and I have nEver used bleach on her until today! I believe this was a result of left over color in the sink bowl. I tried bleach and 20 volume. Nothing. Bleach and 40 volume, still nothing. Any suggestions?

A WOMAN was temporarily blinded when her face swelled up "like a football" following what she told was a severe reaction to hair dye.

Carmen Rowe, 25, from Swansea was hospitalised for three days after using the Clairol 'Nice n' Easy' natural black colour. She said: "I lost my job, all for the sake of a glamorous hairstyle. I just want to warn parents what could happen." She claimed she carried out a skin test 48 hours before using the dye without a problem and has been colouring her hair since she was 13. March 3, 2012.

Example of one who's hair is falling and stopped growing from YA!:

"my hair had been bleached many times and can't grow past a certain length

its also falling out . i stopped bleaching it.

i just need to add lenght! but if i can stop it from falling out..that be great too"

No, that's not a good idea, it doesn't sound like it's a horrible color or anything so wait a couple weeks so you don't damage your hair.

it depends on how healthy your hair is and how often you dye it. If you think its healthy and you don't dye it often then it should be fine and you could always use a hot oil treatment and deep condition it if it gets damaged

I think blonde hair is sexiest, but brown hair can become really sexy too. Black hair will be never sexy. It's just really dull and boring and flatters few complexions. Blonde hair looks best with azure eyes.

Too much can really damage ur hair

Wait at least a week.

too dry