Dye black or colored hair dye, which is more harmful?

1, it is best to choose light color for the flowers to be dyed, because the darker the color, the greater the harm, and people with boils, skin ulcers and allergies to hair dyeing should avoid it. Patients with hypertension and heart disease should not dye their hair. Some experts have said that no matter what kind of hair dye or its products you have dyed, it is natural to dye your hair as little as possible or not for the sake of health.

2. The risk of hair blackening is greater. It is more common among people who get sick from dyeing their hair, especially those whose hair turns black and causes allergies, cancer and other diseases, while the probability of young people getting sick from dyeing their hair is relatively small. Experts believe that this may be due to the fact that when dyeing hair, it often takes highlights and often does not touch the junction of hair roots and scalp.

3. Therefore, the harm of hair dye to human body is relatively small. Middle-aged and elderly people tend to have black hair at short intervals. Because of the huge color of new hair and dyed hair, they had to dye their hair again. Skin absorbs hair dye year after year, and their physical foundation is relatively poor, so they are more prone to allergies and cancer.

Extended information 1. Hair dyeing is divided into plant and chemical. The characteristic of plants is that they do not harm the body, but the disadvantage is that they are single in color. Chemical dyeing is seriously polluted and destroys the blood system. Plant dyeing is gradually accepted by people, and there are more and more institutions to promote and study plant dyeing.

Second, whether you dye black or color, you need to pay attention. The following points can be used for reference:

1 Long-term hair dyeing does have an impact on people's health, so experts suggest not dyeing or dyeing as little as possible, preferably not more than twice a year.

② Perm must be done at intervals of one week before dyeing hair.

③ Choose a regular barber shop and use qualified hair dyeing products.

④ Hair should be clean before dyeing. Do not use mousse, hair gel and other styling products, and do not wash your hair.

⑤ Check your scalp before dyeing your hair. If there are bruises, sores and dermatitis, it is not appropriate to dye your hair.

Reference hair dyeing-Baidu encyclopedia