How do you get eczema?

The causes of eczema are complex and may include genetic factors, immune system abnormalities, environmental factors, lifestyle factors, dietary factors, etc. 1. Genetic factors If there is a history of eczema in the family, the individual may carry an associated genetic susceptibility that makes it more prone to eczema under certain conditions. This is because genetic factors may affect the barrier function of the skin, the response of the immune system, etc., thus increasing the risk of eczema. 2. Immune system abnormalities When the immune system is unbalanced or disordered, it may overreact to some external stimuli or self-antigens, causing inflammation and eczema. For example, inflammatory mediators released by immune cells may cause itching, redness, swelling and other symptoms of the skin. 3. Environmental factors Various irritants and allergens in the external environment are important causes of eczema. For example, climate change, air pollution, pollen, dust mites, animal dander, etc., may stimulate the skin to cause eczema. Long-term exposure to humid, sultry environment may also increase the incidence of eczema. 4. Lifestyle factors Poor living habits may also be related to the occurrence of eczema. For example, excessive use of irritating toiletries, frequent bathing and high water temperature, wearing airtight clothing, etc., may damage the skin barrier, leading to eczema. In addition, mental stress, lack of sleep, excessive fatigue, etc. may also affect the body's immune system and skin condition, inducing eczema.5. Dietary factors Some foods may become the inducing factors for eczema, such as milk, eggs, fish, shrimp, beef and mutton and other high protein foods, as well as spicy food, coffee, alcohol and other irritating foods. For sensitive individuals, ingestion of these foods may trigger allergic reactions that can lead to eczema onset or exacerbation.