Facial skin allergies
Introduction
Introduction Facial skin irritation is a very common form of allergies, and 20% of people have skin allergies. Symptoms of skin allergies are itching, and may also be accompanied by redness and swelling, blisters, or symptoms such as crusting and exudate; these lesions vary in shape and size. Occasionally, chest tightness, numbness, swelling, etc. may occur; when these symptoms appear, it is skin allergies.
Cause
Cause
First, the main reason:
The cause of facial skin irritation is mainly due to certain ingredients in cosmetics, which cause irritation to skin cells and cause skin cells to produce antibodies, which leads to allergies. The most sensitizing sources of cosmetics are spices, preservatives, and heavy metals. Among them, heavy metals mainly refer to some cosmetics that have exfoliation, whitening properties and lead content and mercury content. There are also hair dyes such as p-phenylenediamine, cobalt chloride, oil-colored nickel sulfate, and rosin. The spices mentioned here are not pure natural high-quality essential oils, generally inferior flavors or chemical flavors, but after artificial flavoring, the taste is good, the effect can not be guaranteed. If people with hereditary sensitive skin use cosmetics in a highly sensitive state, cosmetic contact dermatitis and aggravation of the original disease are highly prone to occur.
If there is no quality problem in cosmetics, consumers still have allergies after use, mainly for the following reasons: 1. Use cosmetics on the basis of original skin inflammation. 2. Cross-use several cosmetics. 3. Use inferior cosmetics. 4. The cosmetics are not used correctly. The use of cosmetics without quality problems causes cosmetics acne, cosmetic dry dermatitis and cosmetic skin pigment abnormalities, mainly related to consumers' improper use of cosmetics. For example, people with oily skin choose cosmetics with water-in-oil preparations, which can cause sebaceous excretion and form blackheads and inflammatory papules, or secondary infections can form pustules.
Second, other reasons:
1, allergic internal factors
(1) The skin structure is damaged.
(2) Decreased skin immunity and protective function.
2, allergic external factors
(1) In case of wind, cold, heat, hot, sun, excitement, hand grab, oppression, seafood, cosmetics, bite, dust, pollen, cold water, etc.
(2) A variety of fake and shoddy cosmetics or cosmetics that are not suitable for you.
(3) After peeling of Chinese herbal medicine or chemicals.
(4) Long-term external rubbing containing hormone cream or cosmetics.
(5) Oily skin or acne damages the skin after healing.
(6) Age: Perhaps the increase in age is an important cause of skin sensitivity. Some people have not been sensitive to skin in previous years, but have become sensitive in recent years. This is because young and healthy skin has a weak acidic sebum film on the surface to keep moisture to protect the skin from external aggression. However, with the increase of age, this layer of sebum film is not as healthy as before, so that some sensitive substances are easy. Invade the skin.
(7) Pets: Sensitive skin is prone to allergies due to the fur of domestic pets. The reason for this allergic to pets is mainly due to the protein secreted by the oil glands of cats and dogs. When the pets are licking, these proteins are stained on the fur and then scattered into the air and attached to the person. Caused by the skin.
(8) Seasonal change: Due to various environmental factors, sensitizing substances such as bacterial spores and pollen scattered in the air will release a large amount of the compound, which is almost all the tissues of the human body, histamine, causing facial skin allergies.
(9) Temperature change: The temperature is hot and cold, which makes the sensitive people's face red and hot.
(10) Ultraviolet rays: Ultraviolet radiation causes facial skin irritation.
(11) Idiopathic constitution.
Third, common allergens in spring
There are many allergens in spring. For people with allergies, any other item may cause skin irritation. Our common allergens are:
Pollen: In spring, all kinds of flowers and plants are open. Pollen will release a lot of pollen grains during this period, which is a major factor leading to high allergies in spring.
Dust mites: Aphids grow in the dust around us, and the temperature and humidity in spring are just right for their growth and reproduction. Asthmatic patients and allergic people inhale these dusts that contain a lot of mites, and asthma can occur.
Pathogens: Spring is prone to colds, and people's resistance is poor. Viruses, bacteria, mycoplasma and other pathogens are directly inhaled as an allergen. Therefore, if you have a cold, asthma will continue to attack, and even the rose.
Climate: The temperature in spring is unstable, the temperature difference between day and night is large, and some people are allergic to the cold and heat of the air, which can induce asthma attacks.
Examine
an examination
Related inspection
Allergen screening
1, the entire face or local rash, may be accompanied by redness and swelling, blisters, or lesions and oozing and other symptoms; these lesions vary in shape and size, other skin allergy symptoms including itching, hit Sneezing, runny nose, tears, rash, airway obstruction, or skin symptoms such as urticaria.
2. The contact dermatitis examination program caused by allergic reaction is mainly based on the inspection box "A"; the case caused by the primary irritant, the lesion range is widely associated with systemic symptoms, and the examination project may include the "A" of the inspection frame. "B".
3. Allergen examination.
Diagnosis
Differential diagnosis
Facial eczema: Eczema is a common inflammatory skin disease caused by a variety of internal and external factors in the epidermis and dermis. It is generally considered to be related to allergies. Its clinical manifestations are characterized by symmetry, exudation, pruritic skin disease, pleomorphism and recurrence. Eczema is a skin disease that is easy to relapse. It is also an allergic inflammatory skin disease characterized by rash diversity, symmetric distribution, repeated itching, and easy to evolve into chronic. Can occur in any part of any age, any season, but often in the winter recurrence or exacerbation of exudation tendency, chronic course, easy to recurrent.
