White circle with red dot in center of my back?

It is possible that the white circle with a red dot in the center on your back is a cherry angioma. Cherry angiomas are common, non-cancerous growths of small blood vessels that can appear anywhere on the body. They are usually bright red or purple in color and can range in size from a pinhead to a pencil eraser. Cherry angiomas are often harmless and do not require treatment.