Scabies is a contagious skin condition caused by an infestation of the mite Sarcoptes scabiei. It is also known as mange, which is a five-letter word in the crossword, and is characterized by intense itching. The four-letter word in the crossword, ITCH, is a symptom of scabies. Scabies is spread through direct contact with an infected person or animal, and can be treated with topical medications.