The principle of perm is that the ammonium sulfonium (alkali) in the special perm solution enters the cortex through the hair scales on the hair surface, changing the protein chain structure of hair and forming curly hair. Generally, when perming, the small spring of cystine is decomposed by reducing chemical solution to break the hydrophobic-sulfur bridge bond of cystine and form two cysteines. At this time, the amino acid chain of hair will be loosened and rolled into a certain waveform, which is at the mercy of others. Then, a fixing agent is used to make the cysteine of the disconnected small spring two combination together to form a new spring and fix the hairstyle.

In the process of perming, the alkaline components and oxidation in the liquid medicine will cause the scales on the hair surface to be destroyed. If the internal structure of hair is not protected, it will cause the loss of water and nutrients, which is harmful to hair, scalp and hair follicles, and will denature the keratin of hair more or less, making hair easy to turn yellow, brittle, dull and inelastic. Experts believe that perm should not be too frequent, not more than four times a year.

There are many hazards of perming, among which chemicals are the most worrying. The hidden serious harm of perm is chronic damage to human body, which may lead to many kinds of cancer diseases after many years. Scalp hair follicles are the densest in the human body, and chemical toxins can be absorbed into the body through scalp hair follicles. After long-term use, chemical toxins accumulate in the body and enter the human blood. If the dye concentration is too high or dyeing is too frequent, it will destroy blood cells. It may lead to leukemia or lymphoma, and it may also lead to refractory diseases such as bladder cancer, breast cancer and aplastic anemia.

How to repair damaged hair;

Many girls find that their hair is badly damaged after perm. What is the expert's advice?

1. Hair mask is not suitable for damaged hair after perming, because it will open the hair scales and make the damaged hair attacked again. However, it is more convenient to use hair mask for damaged hair. Hair mask is a kind of deep nutrition care, which can provide all kinds of nutrients needed for hair growth and is a common hair care product.

2, baking oil care Many people think that baking oil is just a way for white hair to turn black. In fact, some professional baking oil products also have excellent effects on repairing damaged hair. After dyeing your hair for one month, do baking oil care once, and you can see obvious results without too frequent.

3. To reduce the damage to hair after stimulating perming, we need to do a good job in hair care and protection, such as not blowing hair too high, not going out with wet hair after washing your hair, paying attention to a balanced diet and so on.

4. Shampooing principle of damaged hair Generally speaking, after the hair is damaged by perming, its own structure changes and becomes more fragile than normal hair. Therefore, the first measure of our restoration is to wash our hair with warm water. Too hot and too cold shampoo will aggravate the damage of hair, so shampooing seems simple, but it is an important habit to repair damaged hair. The above is the answer to how to deal with hair damage after perm. Pay attention to your hair, or it will be troublesome to cause a lot of hair loss.

I hope I can help you!