Some people say that dyeing hair is related to serious diseases such as skin cancer. This statement has not been confirmed by the medical profession, but it is better to choose genuine hair dyes produced by regular manufacturers. If you dye your hair, you will absorb some toxins. If you want to detoxify by drinking water, it will promote the elimination of toxins. As for how much water you drink, it is related to your personal physique and the kind of water you drink.
Allergic reactions caused by hair dyes are very common.
Before dyeing your hair, you need to do an experiment, that is, apply a little hair dye behind your ears to see if there are any allergic symptoms. If yes, don't use hair dye. If not, you can dye your hair.
A friend had a whim to go to the hair salon to dye his hair, and his face swelled up the next day, which was caused by hair dye allergy.
Classification of hair dyes
Hair dyes can be divided into temporary hair dyes, semi-permanent hair dyes and permanent hair dyes according to the aging of hair dyeing.
Temporary hair dye is a kind of hair dye that can be washed off. It is applied to the surface of hair so that it can be washed off easily.
Semi-permanent hair dye needs to be washed off many times. This kind of hair dye can penetrate into the hair surface and stay longer than temporary hair dye.
Permanent hair dye penetrates into the hair cortex by dye intermediates and coupling agents, and after oxidation, coupling and condensation, larger fuel molecules are formed and wrapped in hair fibers.
Temporary and semi-permanent hair dyes do little harm to hair. Permanent hair dyes need aniline chemicals for oxidation. When the hair scales on the hair surface are opened by alkaline components, dye molecules will enter the hair cortex, which is harmful to the hair. Therefore, no matter what the hair quality is, the hair may be dry, split and easy to fall off after dyeing.
What problems should I pay attention to when dyeing my hair?
First, allergic people are prohibited.
If you are allergic to hair dye, don't use it. Edema on the skin surface is a trivial matter. If it is laryngeal edema, it is fatal. Therefore, skin test must be done before hair dyeing to avoid allergic reaction of hair dye.
Second, it is best not to wash your hair before dyeing it.
The oil on the hair surface can effectively protect the skin, especially when dyeing hair. This oil has a certain protective effect on the scalp and can also avoid scratches. If the wound comes into contact with hair dye, it is easy to cause inflammation.
Third, pregnant women can't dye their hair, because hair dye is a chemical substance, which is not good for fetal health. Women also have special periods, so it is best to avoid using hair dye.
In short, hair dye is still harmful to the body, so try to dye your hair as little as possible. The frequency of dyeing hair is generally controlled at no more than 4 times a year. Hair dyes should also choose products from regular manufacturers and channels.