Definition: Sparganosis is a condition in which the skin grows thick and hard, resembling a blackened or browned flesh. It occurs when the skin is infected with bacteria or fungi that cause it to grow thick and crusty due to an allergic reaction. Spargans are often found on the surface of the skin as a result of this infection. This condition can be caused by a variety of factors, including infections, allergies, and other medical conditions such as psoriasis.