Asteatosis can be caused by?

Asteatosis, also known as dry skin or xerosis, occurs primarily due to a deficiency of sebum, the natural oil produced by sebaceous glands. When sebum levels are low, the skin lacks the necessary moisture and lipid content, leading to symptoms like dryness, rough texture, and scaly patches. This condition often results from various factors, including changes in environmental conditions or skin care habits, but the fundamental characteristic of asteatosis is indeed the deficiency of the oily substances that help keep the skin hydrated and healthy.

While other factors like environmental influences and sun exposure can contribute to skin dryness, the specific condition of asteatosis directly relates to a lack of sufficient sebum production, making the association with dry and scaly skin from sebum deficiency the most accurate answer.