Skin allergies
Introduction
Introduction Skin allergies are a very common form of allergies, and 20% of people have skin allergies. Skin allergies are also known as "sensitive" skin. From a medical point of view, skin allergies mainly refer to cosmetics, chemicals, pollen, certain foods, polluted air, etc., which cause skin irritation, such as adverse reactions, resulting in redness, itching, peeling and allergic dermatitis. And other anomalies. Sensitive skin can be said to be an unstable skin, a skin that is always on high alert. Pay special attention to its care.
Cause
Cause
1, age, the skin secretion function is degraded, the skin will become thinner in the years of wear, and its protective layer function will also be weakened.
2, long-term exposure to sunlight or air pollution, smoke, ash, UVA and UVB, as well as infrared, will damage the skin, because they produce swimming ions can destroy the skin's lipid protective layer.
3, inferior cosmetics or improper drug damage.
4, physiological factors, stress, mental stress and depression, will weaken the skin's natural resistance, causing its self-repair function to slow down. Such as endocrine disorders.
5. Weather: In the face of the change of weather, the skin needs extra adaptation. For example, in cold weather, if the skin is not fully moisturized, it is very vulnerable.
6. Additives: Some ingredients in skin care products such as antiseptics, dyes, emulsifiers and fragrances may cause skin to become sensitive.
7, idiosyncratic.
Examine
an examination
Related inspection
Radioallergen Adsorption Test (RAST) Antigen Intradermal Test
It is a skin chemical detection test, including lactic acid test, sodium lauryl sulfate test, chloroform-methanol mixture test, dimethyl sulfoxide test, acetamide test, water wash challenge test, capsaicin test. There are two methods for representative lactic acid test: 110% lactic acid aqueous solution is applied to the nasolabial and cheeks with a cotton swab at room temperature; 2, the subject is fully sweated in a chamber at 42 ° C and 80% relative humidity. Then apply a 5% aqueous solution of lactic acid in the nasolabial folds and cheeks. The degree of sting was judged by the 4-point method at 2 and a half minutes and 5 minutes. It is worth noting that the individuals with positive tests above are not necessarily sensitive skin.
Using biomedical engineering techniques, non-invasive techniques are used to measure biophysical parameters to assess changes in skin microscopicity, such as measuring skin water loss through the skin moisture evaporation meter, silica gel replication and scale measuring instrument to evaluate skin 2D or 3D. Surface structure, skin color spectrometer measures skin color, laser Doppler blood flow meter measures skin blood flow, and type A ultrasound system checks thickness changes of epidermis, dermis and subcutaneous tissue. Measuring the skin's transepidermal water loss is the most classic indicator.
Diagnosis
Differential diagnosis
Sensitive self-test
It is a sensitive constitution diagnosed by a physician or has a family history of allergies.
Use acid care products, if it is sour, it will have a tingling sensation.
When you drink alcohol or stay in a non-ventilated room for a long time, your skin will become red and hot.
There will be winter itching, dry skin in the outer oil, and the oil is large, but it looks dull.
The skin is very thin, reddens when exposed to the sun, and faintly reveals cyan blood vessels when there is no redness.
If you have more than three, unfortunately, you are basically sensitive. Your skin is weak, your resistance is poor, and your water evaporates through the skin faster than the average person.
Temporary sensitive self-test
As long as you stay up all night, the skin will be red and itchy every other day.
After exposure, the skin becomes red and does not fade for a long time.
Sensitive symptoms can occur when stress is too high or fatigue.
The skin may peel or itchy during the season when it is hot and cold, or when the humidity increases.
Before each menstruation, the skin becomes rough and rash or peeling occurs.
If you have more than three, it is basically a sensitive skin. At this time, in addition to adjusting your life, a more pragmatic approach is to use skin care products.
Judgment method 2:
(1) When replacing a long-lasting cosmetic brand, the skin may not be able to adapt for a while;
(2) has a history of skin diseases, the skin is more fragile;
(3) It is easier to have acne or blisters than the average person;
(4) Even if the jitter is smashed, the curtain fabric is likely to cause itching;
(5) When the seasons alternate, the skin quality changes are significantly different from normal;
(6) The skin is prone to use a product such as fruit acid to produce a burning tingling sensation;
(7) Allergies to sweat, eye drops, swimming pool water, etc.;
(8) For physical stimuli such as massage or temperature changes, skin redness and other phenomena may occur.
If one or more of your skin conditions occur in one of the above eight symptoms, then most of you are sensitive skin. In addition to the above conscious reactions, sensitive skin is characterized by the following common skin characteristics: thin keratin, dry skin, prone to acute irritation, and poor resistance to mechanical friction.
Judgment method 3:
A: General symptoms:
1. Itching after sweating will cause pain.
2, the skin is always very rough, often peeling.
3, often because of stress or fatigue, things grow.
4. When using new cosmetics, the skin will have problems.
5, in the past one or two years, the use of cosmetics caused by skin inflammation, rash, sun exposure to ultraviolet light, the skin will be red, pain.
B: Symptoms of using cosmetic care:
1. After washing your face, your skin will be tight and red. This is a weak keratin defense function.
2, wipe the lotion, the skin often has a tingling sensation. "This is a weak keratin defense function, alcohol allergy."
3, wiped the high moisturizing beauty liquid, the skin will be itchy, stinging "Hypergic allergy".
4, sunscreen products are not suitable for you "UV absorber allergy."
5, massage or apply mask, you will feel stimulated "physical stimulation allergy."
C: Physical and environmental factors:
1, suffering from flower fen, can be allergic to metals and other items.
2, the skin is fragile, usually easy to grow eczema.
3. Allergic to nylon, rubber, chemical fiber and other substances.
4. When the season changes, the skin condition will be unstable.
If there are more than 7 symptoms in the above situation, it means that it may be sensitive skin.
