What are the side effects of hair dyeing?

Pursuing youth is the dream of many people. When the years show their marks on the body, people will think of some ways to cover up these phenomena. For example, when white hair grows, if the number is relatively small, people will choose to pull out the white hair directly. If the number of white hair is relatively large, people will choose to dye their hair. There are many types of hair dyes available at present, but if used improperly, they will have an impact on your health.

Side Effect 1

May cause cancer. Researchers at Yale University in the United States once surveyed women who had started dyeing their hair before 1980 and found that more than one-third of them would develop lymphoma. Another survey of 13,000 women who dyed their hair by the American Cancer Society showed that their risk of developing leukemia was 3.8 times higher than that of women who did not dye their hair.

Side Effect 2

The most common side effect of hair dye is allergic reaction, and paraphenylenediamine is the most common allergen, so allergy testing should be done on the skin behind the ears before dyeing your hair. Nitro and anthraquinones in some direct hair dyes also have potential allergic reactions, but the incidence rate is lower.

Other hazards of hair dye ingredients include:

1) Poisoning: p-phenylenediamine in oxidative hair dyes can cause poisoning if ingested in solid form (this is not possible in actual hair dyeing);

2) Carcinogenicity: Animal experiments show that exposure to large doses and high concentrations is carcinogenic, and hair dyes can cause leukemia, etc. However, there is no evidence of carcinogenicity with routine use;

3) Reproductive toxicity: Animal experiments have shown that parents using hair dyes before or during pregnancy may increase the risk of cancer in their offspring, and temporary hair dyes are more harmful than permanent ones. However, the investigation found that there was little correlation between hair dyes and infertility or fetal malformations in beauticians and their offspring, which may be related to the smaller exposure amount compared to the experimental dose.

Side Effect 3

An allergic reaction to hair dye is a skin or internal organ lesion caused by the human body's allergy to the ingredients in the hair dye. These lesions can be recovered through treatment. Visceral lesions are relatively small, and the most common are skin reactions, manifested as acute contact dermatitis, etc., with redness, swelling, exudation, itching, etc. on the scalp or face. This type of skin allergic reaction to dyed hair is relatively stubborn. This is because the hair dye remains in the hair cuticle after dyeing. It will continue to release the ingredients in the dye and continue to irritate the skin. Therefore, skin allergic reactions caused by hair dye often require longer treatment.

Side Effect 4

Whether to dye white hair black is a personal choice. Hair dye dyes the hair shaft, not the hair follicles, let alone the hair growth cells, and it cannot change the color of new hair.

Side Effect 5

The people who are not suitable for hair dyeing are mainly children and pregnant women. The main thing to note is that you should do an allergy test before using hair dye.