Why does the skin become dry and itchy in autumn?

The main causes of dry and itchy skin in autumn include the following: 1. Dry weather: The autumn climate is dry, with reduced moisture in the air, causing faster evaporation of skin moisture, which makes the skin prone to dryness and subsequent itching. 2. Skin barrier damage: The dry autumn environment may disrupt the skin's surface sebum film, weakening the skin barrier function and reducing its ability to retain moisture, thereby exacerbating skin dryness and itching. 3. Static electricity: The dry autumn climate easily causes static electricity between clothing and the skin, irritating the skin and triggering itching. 4. Physiological factors: In autumn, large temperature differences between day and night may prevent the skin from adjusting and protecting itself effectively, potentially leading to moisture loss and causing dryness and itching. 5. Medical conditions: Skin diseases such as eczema and psoriasis may be triggered or worsened in the dry autumn climate, manifesting as dry, itchy skin. If symptoms persist or worsen, prompt medical attention should be sought.