How about dyeing your hair?

1, carcinogenic

Ingredients of hair dye: The main ingredients are p-phenylenediamine and hydrogen peroxide, which can fix the color after dyeing, but it is also a strong allergen, which can cause skin allergy to people with sensitive constitution, especially contact dermatitis. It also affects hematopoietic stem cells and is recognized as a carcinogen.

2, hair loss

Benzene compounds such as p-phenylenediamine in hair dye can penetrate into the important part of hair-the stratum corneum, and peroxide reaction occurs, resulting in hair drying, breakage and even hair loss.

3. Allergy

In French, German and other EU countries, p-phenylenediamine (the main component of hair dye) has been banned from being added to hair dye, but it is still used in China. You'd better look at the ingredients of hair cream when dyeing your hair.

4. Damage to liver and kidney

In order to enhance the dyeing effect, some hair dyes on the market will add heavy metals such as lead, mercury and arsenic, and the lead content of some products is even 5- 10 times that of paint. Long-term use will cause chronic damage to the body, not only may lead poisoning symptoms such as dizziness, numbness of limbs, abdominal pain, but also damage the functions of organs such as liver and kidney.

How to reduce hair dyeing injury;

1, dyeing hair will definitely damage hair quality.

The biggest concern for ordinary people to dye their hair is the damage of hair dye to their hair. KingLee, who has done a lot of bleaching and highlighting on hair, said that because a large amount of alkaline substances enter the hair during dyeing, the original protein and amino acids are destroyed, and the dyed hair will become dry and lose luster and elasticity, so the damage to the hair is inevitable. Try to use hair cream with low alkalinity.

When dyeing hair, some hair care ingredients are usually added, which is the popular hair care dyeing at present-hair care and hair dyeing are carried out at the same time.

Levi believes that the biggest harm of hair dye to hair is that it contains hydrogen peroxide, which not only oxidizes but also bleaches. Before, white hair was dyed into black hair without bleaching, as long as the color was formed. It is popular to dye black hair in different colors, such as yellow and burgundy, which requires special substances, such as ammonia water, to bleach black hair first and then add artificial pigments.

2, skin test is very important when dyeing hair.

Dyeing your hair is like making up. If the skin is sensitive, pay attention to safety when dyeing hair. Generally, it is necessary to do a skin test and apply the hair dye to the back of the neck or ears to observe whether there are allergic reactions such as redness and swelling. It will be safer to dye your hair after this test.

When dyeing hair, the hair dye is not directly applied to the scalp, generally 1-2mm away from the scalp. If some basic dyes are directly applied to the scalp, it may lead to an increase in dandruff, because the PH value of the skin is weak and acidic, and alkaline substances will make the skin desquamate.

Lai Wei once met a man who had dyed his hair for a long time. Because of his white hair, he needs to dye it once a month The scalp itches for a few days after each dyeing. Many doctors say it is seborrheic dermatitis, which can't be cured. Later, it was discovered that the scalp itch was caused by dyeing hair.

Hair dye contains complex chemical components, which can cause skin allergy, hair quality change or shedding if used improperly. There are many brands of hair dyes on the market, so you'd better consult a barber before using them.

3. Make-up dyeing is needed 1-2 months after dyeing.

About two months after dyeing, the hair is oxidized by air, water and sunlight. And the pigment particles are constantly losing, so they will fade, just like new clothes. If you wear it too many times, it will naturally fade. Jin Li believes that makeup dyeing should be carried out at this time. Generally, dyeing hair can last for 6-8 weeks and keep the color basically unchanged, or you can experience 16-20 shampoos.

You need to replenish it in time after dyeing your hair. When the new hair grows 2-3 cm, you should go to a professional hair salon to supplement it. Make-up dyeing is not only a process of consolidating hair color, but also a process of caring for hair.

References:

Baidu encyclopedia, dyeing hair