2 AnswersColoring your hair can cause it to become dry and brittle. Dermatologists recommend using treatments such as coloring on a limited basis and using a conditioner every time you shampoo to improve the strength and increase the shine of your hair. Also, be especially gentle with color treated hair, limiting your use of heated products such as curling irons or blow dryers. Taking especially good care of your hair after you have had a chemical treatment such as a coloring will help keep your hair healthy.
2 AnswersBleaching uses harsh chemicals, which can be especially damaging to hair, drying it out or making it brittle. Dermatologists recommend using hair services such as bleaching on a limited basis, and using conditioner each time you shampoo. A conditioning hair care product cannot repair damaged hair, but it can increase shine, improve strength, decrease static electricity, and also help protect hair from harmful ultraviolet (UV) rays.
2 AnswersWhen coloring your hair, always read and follow the package directions. Some hair color products can cause an allergic reaction such as swelling and redness in some people, so do a patch test before you use the dye on your hair. To do a patch test, place a small amount of the dye on the inside of your elbow or behind your ear, and leave it there for two days. If you haven't had a reaction in two days, the dye should be safe to use on your head.
Wear gloves when you put the dye in your hair. Don't leave the dye on longer than the directions indicate, and be sure to rinse your hair and scalp well when you're done.
Never use hair dyes on your eyelashes or eyebrows.
If you have any concerns about sensitivity to hair color products, share them with your doctor or dermatologist. Ask your doctor how hair coloring may affect your specific skin type.
1 AnswerHair coloring can cause adverse reactions such as burning, redness, and irritation, especially if you are sensitive to any of the ingredients in the dye. If you're allergic to the dye you might develop a rash or even blisters.
Before using hair dye at home or having your hair colored at a salon, you or the colorist should do a patch test to make sure you won't have a bad reaction. Place a small amount of the dye on the inside of your elbow or behind your ear, and leave it there for two days. If you haven't had a reaction in two days, the dye should be safe to use on your head.
If you're using hair dye at home, be sure to read and follow the package instructions carefully. Never use hair dyes on your eyelashes or eyebrows.
If you have any concerns about adverse reaction to hair coloring products, talk with your doctor or dermatologist.
2 AnswersColoring your hair can irritate your scalp, especially if you are sensitive to certain ingredients. To avoid an allergic reaction, it's a good idea to do a patch test before using the dye on your hair. Apply a little bit of the dye to the inside of your elbow or behind your ear and leave it there for two days. If you notice any skin reaction such as a rash, you don't want to use the dye on your hair or it will almost certainly irritate your scalp.
When you use hair dye, leave it on only as long as the directions indicate, and be sure to rinse your scalp well afterwards.
If you use a hair dye and it causes a reaction, don't use it again. Talk to a dermatologist about the reaction.
2 AnswersLead acetate is used as a color additive in progressive hair dyes, the kinds of dyes that are combed into the hair to cover gray and darken the hair gradually. In studies, people who applied these hair dyes according to directions did not have increased levels of lead in their bloodstream and their bodies did not appear to absorb the lead. The Food and Drug Administration (FDA) determined that these dyes were safe when instructions are followed carefully, but that every dye containing lead acetate should carry a label stating that the product contains lead acetate, that it should be kept out of children's reach, and that it should not be used on irritated skin, or on hair other than on the scalp.
2 AnswersRead all package instructions before using hair dye. Consider trying a small sample of hair dye on a patch of skin, such as your inner arm, before applying it to your hair. If your skin develops a rash within a few days, you may be allergic to the hair dye. Also follow these additional precautions:
- Never apply hair dye to your eyebrows or eyelashes.
- Never mix hair dye products.
- Wear gloves when applying hair dye.
- Don't leave dye in place longer than instructed.
- Keep hair dye away from children.
2 AnswersIn some cases, people who use hair dyes may experience certain side effects. Some common problems hair dye may cause include itching and swelling. Hair dye may also cause other problems, such as hair loss and trouble breathing.
To stay safe while using hair dyes, follow all package instructions. You may also want to try testing a small amount of hair dye on a patch of skin, such as on your inner arm. If you don't develop a rash or other problem after a few days, the hair dye is probably safe for you to use.
I am not aware of any convincing evidence that hair dye use causes bladder cancer. The main risk factor for bladder cancer is tobacco use. There is some data that high fluid intake minimizes the risk of recurrence of bladder cancer, and it is imperative that anyone diagnosed with bladder cancer not smoke.
1 AnswerRiverside Cancer Care Center answered
Many people in the U.S. and Europe use hair dyes. It is estimated that more than one-third of women over age 18 and about 10 percent of men over age 40 use some type of hair dye. Modern hair dyes are classified as permanent, semi permanent, and temporary. Permanent hair dyes, which make up about 80 percent of the market, consist of colorless dye "intermediates" and dye "couplers." In the presence of hydrogen peroxide, the intermediates and couplers react to form pigment molecules. Darker colors are formed by using higher concentrations of intermediates. Semi permanent and temporary hair dyes are nonoxidative and include colored compounds that stain hair directly.
Over 5,000 different chemicals are used in hair dye products, some of which are reported to be carcinogenic in animals. Because so many people use hair dyes, scientists have tried to determine whether exposure to the chemicals in hair coloring products is associated with an increased risk of cancer in people.
Early hair dye formulations contained chemicals, including aromatic amines that were found to cause cancer in animals. In the mid- to late 1970s, however, manufacturers changed the components in dye products to eliminate some of these chemicals. It is not known whether some of the chemicals still used in hair dyes can cause cancer. Given the widespread use of hair dye products, even a small increase in risk may have a considerable public health impact.
Over the years, some epidemiologic studies have found an increased risk of bladder cancer in hairdressers and barbers. A 2008 report of the Working Group of the International Agency for Research on Cancer (IARC) concluded that some of the chemicals these workers are exposed to occupationally are "probably carcinogenic to humans".
Although some studies have linked the personal use of hair dyes with increased risks of certain cancers of the blood and bone marrow, such as non-Hodgkin lymphoma and leukemia, other studies have not shown such links. Studies of breast and bladder cancer have also produced conflicting results. Relatively few studies have been published about the association of hair dye use with the risk of other cancers. Based on its review of the evidence, IARC concluded that personal use of hair dyes is "not classifiable as to its carcinogenicity to humans".
This answer is based on source information from the National Cancer Institute.