How does the chigoe flea differ from most other fleas?

The chigoe flea, also known as the jigger, differs from most other fleas because of its unique reproductive behavior. While most fleas remain on the surface of their host to feed, the pregnant female chigoe flea (Tunga penetrans) burrows directly into the skin of its host, typically on the feet.12

Once embedded, the flea lives within a cyst that forms around it. As the flea’s abdomen swells to the size of a pea during the development of the cyst, it causes intense itching. This process can lead to serious complications if secondary infections occur. It is important to note that the chigoe flea should not be confused with the "chigger," which is a type of larval mite.1