creeping eruption

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A human skin disease caused by hookworm or roundworm larvae burrowing and creeping beneath the skin and characterized by eruptions in the form of progressing reddish lines.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun parasitology a skin disease caused by the movement of certain species of ancylostomatids under the skin