Many people are in a hurry after they are allergic, because there are many reasons for allergies, so-called symptomatic medicine can only be given. First analyze what kind of reasons lead to allergies, and then go for targeted treatment. Let's follow the small edition of sihai.com to have a look. Allergic internal cause:
1. Damaged skin structure
2. The skin immunity and protective function decreased.
External causes of allergy:
1. In case of wind, cold, heat, heat, sun, excitement, hand grasping, oppression, seafood, cosmetics, bite, dust, pollen, cold water, etc
2. All kinds of fake and shoddy cosmetics or cosmetics not suitable for oneself
3. After peeling of Chinese herbal medicine or chemicals
4. Long term external application of hormone containing ointment or cosmetics
5. Damage to the skin after the healing of oily skin or acne
6. Age: perhaps the growth of age is an important reason for skin sensitivity. Some people's skin is not sensitive in the past few years, but it has become sensitive in the past few years. This is because there is a layer of weak acid sebum on the surface of young and healthy skin, which can keep moisture to protect the skin from external damage. However, with the growth of age, this layer of sebum is not as healthy as before, so that some sensitive substances are easy to invade the skin.
7. Pets: sensitive skin is easily allergic to the fur of domestic pets. This kind of allergy is mainly caused by the proteins secreted by the fat glands of cats and dogs. When pets lick their hair, these proteins touch the fur, then scatter into the air and attach to the human skin.
8. Seasonal change: due to various environmental factors, the bacterial spores, pollens and other sensitizing substances scattered in the air will release a large number of compounds - histamine, which can be found in almost all tissues of the human body, causing facial skin allergy.
9. Temperature change: the temperature changes from cold to hot, making the face of sensitive people red and hot.
10. UV: UV radiation causes facial skin allergy.