Which term refers to flat red or pink patches that appear on eyelids and typically disappear within a few months?

The term that describes flat red or pink patches that appear on the eyelids and typically fade within a few months is "Salmon Patches." These patches, also known as angel's kisses when they are located on the eyelids, are common in newborns and are a type of capillary malformation. They occur due to the presence of small, dilated blood vessels near the surface of the skin.

Salmon patches are benign and usually do not require treatment as they often resolve on their own during the first year of life. This characteristic of disappearing over time distinguishes them from other skin markings that may not have the same tendency.

Other terms mentioned pertain to different conditions; for instance, infantile haemangiomas are raised, strawberry-like growths that may develop in infancy but typically take longer to resolve. Mongolian spots are blue or purple marks that usually occur on the lower back or buttocks of infants and may persist for several years. Lanugo refers to the fine, soft hair that covers a fetus and is usually shed before birth, thus not applicable to this question.