Pay attention to hair dyeing!Improper operation may swell into "pig head" …

| Planning/Edit: Xiaoya Responsible Editor: YELLOW & Yayun Review: Li Yun

The next year will be celebrated next week. Presumably many little fairy must have already planned a good New Year plan, and began to prepare for the "three -piece set" of the New Year.

Make nail art, hair perm, and eyelashes. After all, new and new weather, go to various gatherings, annual meetings, sisters party

(It is not ruled out that the blind date arranged by the parents is waiting for you)

So … how can I do it?

Having said that, the high value starts from the beginning, dyed a hair color, and made a beautiful look. When I return to the village, it is the most beautiful cub ~

Although this mood is very understandable, tossing hair also needs to be cautious, such as improper hair dyeing behaviors may cause hair dye dermatitis!

● Share a real example:

19 -year -old Estelle, who bought a hair dye at home in the mall.Before the operation, although she did the skin spotting test according to the prompts on the packaging, she did not wait for the 48 -hour test time according to the requirements of the instruction manual, and she began to dye her hair anxiously.As a result, Estelle felt a strong tingling sensation in the scalp after applying hair dye.

(Original appearance)

She realized that something was wrong, and immediately washed away the hair dye, and then used the antihistamine drugs, even if she did not escape a series of allergic reactions.

(That night, her face had already appeared edema)

The next day, it turned into a "alien", and the head circumference changed from the original 56cm to 63cm, and almost even the eyes could not be opened.She went to the emergency department in time after a doctor’s treatment.

Share the above story that wants everyone to pay attention to, not everyone is suitable for hair dyeing.Return to the theme, let’s introduce what is hair dyeing dermatitis in detail. What should I do?

Understand hair dermatitis

As the name suggests, it means that in the process of hairdressing, hairdressing, and hair care, it is inevitable to contact perm, hair dye, hair care agent, etc.These substances themselves and certain raw materials (such as phenylramine) can cause irritation or sensitivity to the skin, causing acute inflammatory response in the skin.Hair -dye dermatitis is a type of contact dermatitis.

The symptoms of hair dye dermatitis are manifested in the emergence of erythema, mild swelling, pimples and other phenomena in the contact site. Severe may have blisters, erosion or exudation.Patients usually feel obvious itching, burning, and swelling.It is usually common in scalp, facial, auricle and neck.

Seeing this, someone will ask, why do people dye their hair without having their hair, and their hair dyeing her hair dyeing dermatitis?

The probability is because of allergies to pyramamine (PPDA), which causes a series of allergic reactions.

二 对

Phenyleneramine is a coloring agent in a hair dye. It is widely used in the dyeing agent because phenyline has a strong affinity to the keratin in the hair, which can help the color solid color in the hair dye.

(Matsyramine hair dyeing mechanism)

But at the same time, pyramamine is internationally recognized as a substance that has strong sensitivity to the human body (it can contact or absorb through the skin, which can cause contact dermatitis, eczema, bronchial asthma).The ingredients are listed as contact -type allergens.

In my country’s current regulations, "Cosmetics Sanitation Specifications" stipulates that the maximum allowable concentration of pyramlamine in hair dye is 6%, while EU countries have reduced the permitted concentration of phenylene amine in hair dye from the original 6%to 2 to 2 %.

Therefore, the "Cosmetics Sanitation Specifications" also stipulate that if the hair dyeing product adds phenyline -dyed ingredients, it must be indicated that the substance must be included; and it is recommended that consumers do skin allergies before use;And other skin.Once allergic phenomena should be stopped, you should seek medical treatment in time in severe cases.

Speaking of which, do you know why others have hair dyeing and sound, but some people are swollen into "big pig heads"? Of course, in addition to their own allergies to phenyline ingredients, these people are also recommended not to dye hair:

× The head and face suffer from skin diseases such as folliculitis, dermatitis, as well as those with skin injury and low immunity, can wait for a complete recovery before dyeing;

× Preparation of pregnancy, lactating women, pregnant women (especially within three months of pregnancy), because hair dye containing ingredients containing phenyline may have fetal teratogenic risk;

× patients with allergic rhinitis, asthma and other allergic constitution;

How to deal with hair dye dermatitis?

● When you find allergic symptoms, first cover the skin of the face, bring gloves to protect the skin of the hand, and immediately wash the hair dye with warm water as possible. Highly sensitive people should also shave the hair of the dyed hair.Once the symptoms are found, go to a regular hospital for treatment in time.Take relevant treatment measures under the advice of the doctor.

● Symptoms are relatively mild. Generally, after stopping contact with allergens, it may slowly relieve and subscribe.If it is accompanied by symptoms such as itching and local erythema, you can use sugar cortex hormone or calcium phosphatase inhibitors.

● If the symptoms are severe, it is recommended to systematically use glucocorticoids. You can choose hormones or orally.If the wound has obvious secondary infections, antibiotics (such as Mupro star ointment, etc.) can be used.

How to avoid hair dye dermatitis?

◆ The main measure of prevention is to avoid contact with stimulus and sensitivity.For example, if you know that you are allergic to pyramamine or allergic to other chemical components, do not try to dye your hair with a chance.

◆ Do your skin test before dyeing hair.A little hair dye can be applied at the hair dyeing area or behind the ear, and then observe for 24 ~ 48 hours (remember to meet this time range).If the local skin is found to have red swelling, blisters and other reactions after testing, do not dye hair.

◆ If you live in your own hair, you are recommended to purchase hair dye produced by regular manufacturers.

◆ Warm tips: Before dyeing your hair, you can also apply Vaselin or lotion behind the hairline and ear to prevent damage to the skin to cause damage to the skin. When preparing to dye your hair, you remind your teacher Tony to try not to let your hair dye directly contact the scalp.

In the end, despite the new weather in the new year, I want to have a new image of a happy year, but I still sincerely hope everyone:

Can not dye your hair, or don’t dye

I can’t help it, I have to dye my hair as little as possible

Share this article for friends who love hair around you


[1] "Cosmetics Sanitation Specifications".

[2] Zhang Xuejun, Zheng Jie, skin sex disease. 9th edition [M]. Beijing: People’s Health Publishing House, 2018: 104-105,110.

[3] Mayo Clinic-CONTACT DERMATITI Mero Medical Center:


The data update of this article was updated on January 10, 2022

Originally created by "Professor Yang Xichuan of Dermatology", it aims to be popular for readers

The popular science content cannot replace the doctor’s diagnosis and treatment, for reference only

If you have skin problems, please consult the doctor in time

Some pictures source networks, if there is any infringement, please contact and delete

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