The New Year is coming, the sisters all want to start from the "head" to be beautiful, but they heard that the total hair dye has a cancer risk, so they have come to ask Zhimei what to do.
Today we will talk about it in detail.
Dye your hair two or three times a year, and don't worry too much about carcinogenicity.
It is true that long-term exposure to hair dyes, such as Tony teachers, may increase the risk of breast, bladder, and lung cancer [1-3].
But most people dye their hair 1-3 times a year, which is far from reaching the level of carcinogenic risk, if you are not at ease, you can check out the Harvard team's research:
In 2020, Institutions such as Harvard Medical School published an article on permanent hair dye in the well-known journal British Medical Journal.
They surveyed and followed up 117,000 female nurses for 36 years, analyzed the data, and concluded:
Permanent hair dyes do not increase the risk of most cancers and are not associated with cancer-related mortality [4].
However, hair coloring does have risks such as allergies and hair damage, but the following can be avoided to a large extent:
Don't do it too many times
It is best not to exceed three times a year, with an interval of more than three months each time [6].
In these periods, don't dye for the time being
Before hair coloring, you can check the scalp and the skin around the hair, if there are wounds, acne, dandruff, hair loss and other problems, or cure it first.
It is also not recommended for pregnant women and nursing new mothers to dye their hair, for babies, it is still more reassuring to be cautious!
Try to get an allergy test first
Sisters with conditions, it is best to have a skin allergy test 48 hours before hair coloring.
You can apply a little hair dye on the earlobe or the inside of the elbow, and if there is no redness, swelling, heat and pain, then put it on the head.
It is best to buy it yourself with a "national makeup special character" approval
If you find that the label label is not standardized, such as no Chinese label, ingredient list, hair color warning, do not buy [7].
(Source: Network)
Try to buy in formal channels, it is best not to buy on behalf of.
Foreign products have not been tested by the national certification agency for toxicology, safety and other tests, or there are certain risks.
Look at the packaging when you go to the barbershop to dye it
You can ask the barber to show the product packaging and see if the spell does not meet the points mentioned earlier.
When choosing a barbershop, it is best to choose a barber shop with more protective measures in place, such as ear tips and shawls.
Pure plant hair dyes are not safer
Plant dyes have not been confirmed to be safer, and because of poor coloring effects and high extraction thresholds, there is currently no pure plant hair dye that has been approved in China.
Most plant hair dyes on the market are just gimmicks, and they are added to the traditional hair dye with a part of the plant extract, and there is no need to choose.
1
Those that can be dyed as deeply as possible, and those that can not float their hair as much as possible
Dyeing dark colors without bleaching, it can try not to hurt the hair and scalp, and it also shows white skin.
And all regular hair dyes will fade after dyeing, dark colors will not be embarrassed to fall off, and light colors will have obvious color differences, especially when black hair grows out.
2
It is best not to wash your hair 1-2 days before coloring your hair
The oil secreted by the scalp can form a sebaceous film that protects the skin from external irritations.
Don't worry about washing your hair, apply some cream to the scalp, or let the barber apply some protective cream to the scalp, which can also reduce the irritation of the hair dye to the scalp.
3
I feel itchy scalp and can't pick it
When coloring hair, you can apply some cream to the hairline, ears, side of the face, and neck to reduce the irritation caused by the hair dye touching the skin.
When you dye your hair, you feel itchy scalp, don't cut it, otherwise it is easy to induce infection.
You can first use the hair dryer cold air stall to blow it, if it is still itchy, even stinging, rash, it is recommended to stop dyeing immediately, and rinse the hair dye with water.
1, hot dyeing is best not to do together
Both perm and hair color can damage the hair, and doing both at the same time will cause 1+1>2 damage.
2. Wash your hair with your fingertips instead of your nails
This avoids scratching the scalp and causing the hair dye to irritate the wound.
3. Dandruff may be allergic
In addition to redness, swelling, and itching of the skin, more dandruff after hair coloring may also be an allergy.
At this time, do not blindly use anti-dandruff shampoo, it is best to choose a mild shampoo and conditioner.
If the situation worsens, or even the eyelids, facial swelling, breathing difficulties, etc., be sure to rush to the hospital dermatology department to see.
Allergic manifestations
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Finally, once in a while to dye hair, in fact, it is quite safe, we really do not need to be too anxious, want to take advantage of the sisters who dyed their hair years ago, you can rest assured that it is arranged!
Reviewer
Chi Huiyan | Chief Physician of the Department of Dermatology, Xiyuan Hospital, China Academy of Chinese Medical Sciences
bibliography
[1] Eberle C E , Sandler D P , Taylor K W , et al. Hair dye and chemical straightener use and breast cancer risk in a large US population of black and white women[J]. International Journal of Cancer, 2019, 147(2).
[2] Koutros S , Silverman D T , Baris D , et al. Hair dye use and risk of bladder cancer in the New England bladder cancer study[J]. International Journal of Cancer Journal International Du Cancer, 2011, 129(12):2894-2904.
[3] Czene K , Tiikkaja S , Hemminki K . Cancer risks in hairdressers: assessment of carcinogenicity of hair dyes and gels. [J]. International Journal of Cancer, 2010, 105(1):108–112.
[4] Y. Zhang, B.M. Birmann, J. Han, E. L. Giovannucci, F. E. Speizer, M. J. Stampfer, B. A. Rosner, E. S. Schernhammer, BMJ 2020, 370, m2942.
Hu Zhangyi, Li Na, Huang Bo. Treatment and care of contact dermatitis complicated by large ulcers of the scalp[J]. Dermatology and St. 1997, 2021, 43(5):3.
Su Shuoran. Is hair dye harmful to the body? [J]. China Cosmetics, 2020(11):4.
Zheng Yi. The thing about hair dyeing[J]. Quality and Standardization, 2019(8):2.
Cao Lei, Fan Weixin, Wang Lei. Damage to hair caused by perm and coloring and the repair effect of conditioner on it[J]. Journal of Clinical Dermatology, 2008, 37(6):3.
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