All dermatitis caused by mite bites is collectively called mite dermatitis. There are many types of mites, and here we only introduce dermatitis caused by lice mites, flour mites, etc. Because this disease often occurs in farmers who come into contact with grains during the autumn harvest season, it is also called grain itch, commonly known as "barley itch", "straw itch", "grocery itch", "grass itch", "urticarial mite dermatitis", "Phe dermatitis", etc. Since this type of mites parasitizes on crops, flour, groceries and the larvae of soft insects to obtain nutrition, this disease often occurs in farmers, porters, and millers who often come into contact with crops and their products, and occasionally in people who often sleep on straw mats.