”Did you know that cosmetics can cause disease?” ”I only know that cosmetics can bring beauty to people, but I’ve never heard that cosmetics can also cause diseases.” “Usually we only focus on the effects of cosmetics and few people consider the side effects of cosmetics, but the reality is that as more and more people apply cosmetics, the number of reports of diseases caused by cosmetics is increasing.” Especially during the change of seasons, the skin is very unstable due to seasonal changes. As a person with sensitive skin, you should be very careful when using cosmetics for the first time, and it is best to rub them on your forearms and behind your ears for an adaptation test beforehand, and then use them with confidence if there is no reaction.” What is a “good” cosmetic? ”As long as it’s a ‘good’ cosmetic, it’s OK!” Cosmetics are commonly referred to as daily chemical industrial products that are applied to any part of the human body (skin, hair, nails, lips, etc.) by rubbing, spraying or other similar methods to cleanse, eliminate bad odors, and for skin care, beauty and grooming purposes. A “good” cosmetic includes three main components: a correct base; an effective active compound; and a good feeling for the skin. The right matrix includes liposomes, solid lipid particles, hydrogels, polymers, and patches; the active compounds also include anti-photoshopping agents, antioxidants, and cell growth factors. As long as the above three major parts, can be considered “good” cosmetics, of course, good does not mean expensive or imported, but also according to the characteristics of individual skin (medium, dry, oily skin), the use of the occasion, the use of the purpose of the corresponding choice. Fragrances, preservatives are sensitive “killers” As they say, “women dress up the city, cosmetics dress up women.” However, for sensitive skin should not be so obsessed, because the fragrances and preservatives commonly used in cosmetics account for the most dominant position in causing sensitivity, accounting for 26.5% and 32% of the total, respectively. Other substances that cause sensitivity include lanolin, surfactants, resins, etc. Between 61% and 70% of women claim to have “sensitive skin”, but only 20% of them are diagnosed by a doctor, and 40% of them have no clinical signs, but are still considered “sensitive”. If your skin itself is thin and capillary-prone, lacking in luster, with cheeks that are easily congested and red, and susceptible to external environments or substances such as cold winds, irritating foods, water, UV rays, synthetic fibers, fragrances and pigments, then your skin type is easily sensitive or sensitized. Patients with sensitive skin often experience discomfort such as redness, burning, itching, and tightness of the skin. In other words, hypersensitive and allergic skin manifests itself as a lack of daily skin comfort and is very susceptible to irritation. This is mainly due to the fact that the natural barrier function of the skin is impaired and cannot perform its proper protective function. Usually, patients with sensitive skin will experience some symptoms after using general cosmetics, such as redness and tightness after washing the face (weak keratin defense function); using make-up, the skin often has a tingling sensation; using eye shadow, eyeliner and other makeup, easily inflamed and rash; massage or mask will feel irritated and so on. In the end, how to determine whether they are allergic? Generally speaking, it is not easy to apply makeup, dry skin, with flakes; itching, tight skin, keratin or rice-grain-sized red spots; easy to heat up and red when exposed to cold and heat …… At this point, you can judge that your skin may be sensitive skin. After the skin allergy, in principle, you should immediately stop using any irritating cosmetics, observe and maintain the skin care. During this period, do not wash your face with water that is too hot to avoid irritating your skin, and do not use soap and bar soap, because the alkali in soap and bar soap can aggravate the symptoms of skin allergies. When washing your face every night, use a milder cleanser or cleansing lotion to gently rub your face to dissolve the dirt on the surface of your skin, then wash your face with warm water and use a dry towel to absorb the moisture on your face. After washing your face, you can use some skin care products that are specifically designed for sensitive skin. Prevent skin diseases in daily use Cosmetic dermatoses refer to the lesions of the skin and its appendages caused by the use of cosmetics in people’s daily lives, and a group of clinical symptoms with different clinical manifestations, diagnosis and management principles. It includes contact dermatitis, photosensitive dermatitis, skin pigmentation abnormalities, acne, hair damage, nail damage and so on. The main causes of cosmetic dermatoses are: cosmetics themselves, such as poor product quality, microbial contamination in cosmetics, excessive content of toxic substances, etc.; improper use methods, such as heavy makeup affects the normal function of the skin; improper selection of cosmetic types; users themselves are sensitive or certain diseases make the skin in a sensitive state. Among them, urban women are most concerned about the issue of cosmetic acne. It refers to the acne-like rash on the face caused by cosmetics, and it accounts for 3.5-10% of cosmetic skin diseases. It is diagnosed by a clear history of cosmetic exposure and the appearance of blackheads, inflammatory papules, etc. in line with the pores at the site of exposure. If you encounter this situation you must immediately stop using all suspected cosmetics. Remove any cosmetic residue left on the face and maintain cleanliness and hygiene. Treat symptomatically according to anti-inflammatory, antibacterial and keratolytic principles. In addition, cosmetic-induced irritant or allergic contact dermatitis accounts for 70% of cosmetic dermatoses, and 2.2-12.2% of these contact dermatitis are related to cosmetics, while common allergic ingredients include aminomercurial chloride, benzyl alcohol, benzaldehyde, Peruvian balsam, thin river oil …… If cosmetic dermatoses occur, first Stop using all cosmetics, appropriate treatment, generally will not cause serious consequences, individual patients with serious adverse reactions should promptly go to the doctor, do not blindly purchase drugs or their own doctor, otherwise the consequences are unthinkable.