What could cause dry skin on the palm of one's hands?

Dyshidrosis: Read this article http://www.Livestrong.Com/article/77051-dry-skin-hands-feet/ which summarizes the common causes of dry skin on the hands (and feet), treatments, and other important information. Dry skin is usually a temporary condition, and moisturizers can be helpful, as well as identifying the root causes and taking steps to minimize exposure.