Also called livedo reticularis, it is often harmless. Some people have mottled skin after cold exposure, or even tobacco use. The primary type is most often seen in females between ages 20 and 50.

Skin looks mottled, blotchy, and reticulated without distinct borders. It has a network pattern and a bluish, reddish discoloration. It does not blanche. It may be more pronounced with cold weather.