Medically reviewed by Leah Ansell, MD Mottled skin is a bluish-red, lacy or net-like appearance you see underneath the skin.

Skin looks mottled, blotchy, and reticulated without ... Livedo reticularis has many causes. It is thought to be due to spasms of the blood vessels or an abnormality of the local circulation.

Although the mottled skin has not cleared ... in areas of skin after prolonged exposure to heat sources." The main cause is long-term exposure to heat "below the threshold for thermal burn ...