What causes small circular dry patches on skin?

The small circular dry patches on the skin are a symptom of Discoid eczema. It is a chronic skin disease that often causes the skin to become itchy, swollen, and cracked in circular or oval patches. Without treatment, it may last for weeks, months, or years and it may also revive after treatment often in the same area. Whatever abnormality you notice on your skin must be treated otherwise it may take a dangerous turn in near future.