Why is my face red and itchy due to allergies?

Allergy is a common thing in life. There are many substances that can cause allergies, including certain bacteria and viruses, some flowers and plants, and even the cosmetics people use can cause allergic symptoms. Allergic symptoms can be mild or severe. Some friends will simply experience redness of the skin, while others will experience itching symptoms. So what exactly causes redness and itching on the face due to allergies?

Internal and external causes of allergies

1. Internal causes of allergies

1. The skin structure is damaged.

2. The skin's immune and protective functions decline.

Second, allergic external factors

1. Exposure to wind, cold, heat, spicy food, sunlight, excitement, scratching, pressure, seafood, cosmetics, bites, dust, pollen, cold water, etc.

2. Various counterfeit and inferior cosmetics or cosmetics that are not suitable for you.

3. After peeling with Chinese herbal medicine or chemical drugs.

4. Long-term application of hormone-containing ointments or cosmetics.

5. Oily skin or damaged skin after acne heals.

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 change: Due to various environmental factors, allergenic substances such as bacterial spores and pollen dispersed in the air will release a large amount of histamine, a compound that is distributed almost throughout 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.

10. Ultraviolet rays: Ultraviolet rays can cause facial skin allergies.

11. Peculiar constitution.

If you want to know why your face becomes red and itchy due to allergies, first of all, please learn about the above-mentioned allergic causes in detail. Only when you know why you have allergic symptoms can you better solve your allergic symptoms and avoid more serious harm caused by allergies. You must know that if you have allergic asthma, the harm of not treating the allergy in time can be quite serious.