Sensitive skin

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synonym skin sensibility (Skin allergy) Generally refers to sensitive skin
Li Chengrang (Deputy Chief Physician) Dermatology Hospital of Chinese Academy of Medical Sciences
Yang Xueyuan (Chief Physician) Review Dermatology Hospital of Chinese Academy of Medical Sciences
The exact meaning of sensitive skin has not yet been agreed. It is generally believed that sensitive skin is a highly intolerant skin state, which is easily provoked by various factors to produce tingling, burning, tightness itch Multifactor syndrome with normal skin appearance or mild Desquamation , erythema and dryness.
Sensitive skin and "skin allergy" are two different concepts. Skin allergy is a allergy , by allergen After entering the body, it will prompt the body to produce corresponding antibodies, which will trigger Antigen antibody reaction , manifested as erythema papule Wheal And other clinical objective signs, often accompanied by itching. Sensitive skin is usually sensitive to irritation Tolerance It decreases, and a series of abnormal sensory reactions appear, most of which lack objective signs. Although the mechanism of its occurrence is not very clear, it is generally believed that it is not accompanied by immune or allergic mechanisms.
TCM disease name
Sensitive skin
Foreign name
sensitive skin
Visiting department
the skin department
Common causes
Endogenous factors such as gender, genetics, endocrine factors, diseases, etc
common symptom
Conscious itching, tingling, needling, burning and tightness

pathogeny

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The cause of sensitive skin is not completely clear, and it is the result of multiple factors. It can be divided into endogenous factors such as race, age, sex, genetics, endocrine factors, some diseases, and exogenous factors such as chemistry material Stimulation, environmental factors, lifestyle psychological factor Etc.
1. Endogenous factors
(1) Race Because of the number of stratum corneum and intercellular Adhesion Melanin The quantity and volume of Skin sensitivity There are differences.
(2) Age Young people are more prone to skin sensitivity than old people, which may be due to the skin of the elderly sensory nerve Decreased function and nerve distribution.
(3) Gender Generally, women are more sensitive to skin irritation than men, which may be due to the high pH value of women's skin and their poor buffering force for irritation.
(4) Heredity Sensitive skin Most individuals have sensitive skin family history
(5) Endocrine factor Menstrual cycle can affect skin sensitivity.
(6) Disease some skin disease It can increase skin sensitivity, such as atopic dermatitis Seborrheic dermatitis Ichthyosis Etc.
2. External factors
(1) Chemical factors Such as cosmetics, soap, detergent, etc.
(2) Environmental factors Such as rapid changes in cold, heat and temperature, seasonal changes, air pollution, sunlight, etc.
(3) Lifestyle Spicy food and alcohol can be aggravated Skin reaction
(4) Psychological factors Increased stress and emotional mobility often stimulate or exacerbate skin reactions.

clinical manifestation

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Patients with sensitive skin mostly show itching, tingling acupuncture A feeling of burning and tightness. The severity varies, including individual difference After using cosmetics, the discomfort is aggravated, and some people can not even tolerate any skin care products. It can appear minutes after use, hours or even days later. Sometimes visible xerosis cutis , facial erythema, small Scale Facial flushing is easy. Clinical types can be divided into:
1. Environmental
Common in white, dry and thin skin, mainly for environmental factor Reactions occur, such as sensitivity to cold, hot, rapid temperature changes, etc. Can occur frequently Facial flushing
2. Cosmetic type
It mainly reacts to cosmetics.
3. Very sensitive
yes Exogenous Factors such as cosmetics, environmental factors and endogenous All factors can cause serious reactions.

inspect

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It belongs to skin chemical detection test, including lactic acid Test Sodium lauryl sulfate Test chloroform - methanol Mixed liquid Test Dimethyl sulfoxide Test Acetamide Test and water washing Excitation test capsaicin Test. have Representativeness There are two methods for lactic acid test: ① 10% lactic acid aqueous solution is used at room temperature Cotton swab Wipe on Nasolabial sulcus And cheeks; ② Give Way Subjects At 42 ℃ relative humidity 80% of the small rooms, fully sweat, and then apply 5% lactic acid aqueous solution to the nasolabial groove and cheeks. The degree of tingling was evaluated by 4-point method at 2.5 minutes and 5 minutes. It should be noted that the positive individuals in the above tests are not necessarily sensitive skin.
With the help of biology Medical Engineering Technology , measured with noninvasive techniques biophysics Parameter evaluation of minor changes in skin, such as evaporation of skin water Measuring instrument Measure skin transepidermal Water loss silica gel Evaluation of 2D or 3D skin by replication and scale meter surface structure , skin chroma Spectrometer measure Skin color Laser Doppler blood flow meter Measurement of skin blood flow, type A Ultrasound Check the epidermis, dermis and Subcutaneous tissue Change in thickness of. Measurement of transcutaneous water loss is the most classic indicator.

treatment

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For the treatment of general sensitive skin, the first thing is to avoid re stimulation, and try to reduce facial steaming, massage, exfoliation and other cosmetic measures. Cosmetics designed for sensitive skin can be selected, which often contain vitamin B five , carboxymethyl Beta glucan Etc. Because the skin is dry, it can be used with appropriate proportion lipid Moisturizing products. For patients with serious symptoms that affect their daily life, they can take orally Antihistamine , external use of non hormone anti-inflammatory drugs to alleviate symptoms.

prevention

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Sensitivity to skin % of individuals should use simple ingredients, less or no allergens and a stimulus Cosmetics. In daily skin care, adhere to the following three basic principle : Use mild, non irritating detergent and Humectant Keep skin hydrated to maintain healthy cuticle function; Supplement skin oil to strengthen skin barrier.