What can cause skin allergies?

Skin allergy is a very common phenomenon, which is a phenomenon in which the skin reacts abnormally when the human body comes into contact with allergens such as ultraviolet rays and pollen. As pollution becomes increasingly serious today, people may suffer from allergies due to various unexpected substances. It is precisely because of this that we should pay special attention to preventing allergens in our daily lives, that is, stay away from substances that may cause allergies to human skin.

Allergic dermatitis is a skin disease caused by allergens. It mainly refers to skin symptoms such as redness, itching, wheals, and peeling caused by the human body's contact with certain allergens. Specific allergens can be divided into four categories: contact allergens, inhaled allergens, ingested allergens and injected allergens. Each type of allergen can cause a corresponding allergic reaction, the main manifestations of which are various dermatitis, eczema, and urticaria. For example:

1. Pollen: In the pollen transmission season, tiny pollen particles will be scattered in the air during the transmission process and fly around with the flow of air, and some of them will be inhaled by people and absorbed by the skin.

2. Dust: Dust allergy is an allergic reaction to microorganisms that live in dust and is the most common allergy. Dust allergies include cotton, fur and various fibers, animal fur, etc.

3. Cosmetics: The most typical cosmetic allergy is fragrance allergy, and cosmetics containing alcohol ingredients such as astringents can also cause certain irritation to the skin. Others such as biochemical preservatives, fruit acids, etc. will cause different irritations to different skin types.

4. Food: Seafood, mangoes, and nuts are common foods that can cause allergies.

5. Drugs: Penicillin, sulfonamides, etc. may cause skin allergies.

6. Age: Perhaps aging is an important reason for skin sensitivity. Some people's skin was not sensitive a few years ago, but has become sensitive in recent years. This is because there is a weakly acidic sebum film on the surface of young and healthy skin, which retains moisture and protects the skin from external damage. However, as we age, this sebum film is not as healthy as before, making it easy for some sensitive substances to invade the skin.

7. Pets: Sensitive skin can easily develop allergies due to the fur of domestic pets. The main cause of this pet allergy is the protein secreted by the oil glands on the bodies of cats and dogs. When pets lick their fur, these proteins are attached to the fur, then scattered into the air and attached to human skin.

8. Seasonal changes: Due to various environmental factors, allergenic substances such as bacterial spores and pollen dispersed in the air will release a large amount of compounds - histamine, which are almost distributed in all tissues of the human body, causing facial skin allergies.

9. Temperature changes: The temperature fluctuates between hot and cold, causing redness and hotness on the face of sensitive people.