What Causes Dry, Itchy Skin?
Apr 26, 2022
Source: Cainiu Health
Dr. Liu Wan
Introduction
Dry skin primarily results from inadequate fluid intake—namely, insufficient water consumption. Eating excessively dry foods can also lead to bodily dehydration. When the body is dehydrated, less water reaches the skin surface, resulting in dryness and itching. External water deficiency—i.e., environmental factors—also contributes significantly. For example, during winter indoors, ambient humidity decreases markedly, exerting a desiccating (drying) effect on the skin and thereby causing dryness.
In daily life, some individuals experience dry, itchy skin—a condition that can significantly disrupt normal daily activities and overall well-being. What, then, causes dry, itchy skin?
What Causes Dry, Itchy Skin?
Internal dehydration is a primary cause—mainly resulting from inadequate fluid intake (i.e., insufficient water consumption). Consuming excessively dry or overly hot foods can also contribute to bodily dehydration. When the body lacks sufficient internal water, less moisture reaches the skin surface, leading to dryness and itching. External dehydration—caused by environmental factors—also plays a significant role. For example, during winter, indoor heating often raises room temperatures to 26°C, 28°C, or even 30°C, drastically reducing ambient humidity. This low-humidity environment exerts a desiccating effect on the skin, triggering dryness. To minimize such effects, using a humidifier, placing open containers of water indoors, or periodically ventilating the room by opening windows can effectively mitigate the damaging impact of dry air on the skin.
Insufficient sebum (oil) production is another key factor. Sebum is an essential component of the skin’s natural barrier. A deficiency in sebum compromises the integrity of this protective barrier, causing it to weaken and shrink. Consequently, the skin’s ability to retain moisture diminishes, rendering it highly susceptible to dryness. Therefore, replenishing both moisture and oil is indispensable in skincare. Only adequate hydration combined with appropriate lipid supplementation can effectively prevent and treat dry, itchy skin.
Additionally, if symptoms develop, prompt medical evaluation at a healthcare facility is strongly recommended. Treatment should be undertaken under the guidance of a qualified physician. We hope this information proves helpful to you!
