BITOSO
Folklore of the Romany Gypsies
A disease DEMON in the folklore of the Romany Gypsies of Europe. This evil SPIRIT was the result of the union between ANA and the King of the DEMONS after he had eaten cloves of garlic covered in his urine. BISTO, whose name means One Who Fasts, takes the shape of a tiny many headed worm. He is responsible for causing humans loss of appetite, headaches, and stomach aches. BISTO has several "children", each buzzing around human bodies causing problems such as earache, toothache, cramps, and colic.
SOURCE: Spirits, Fairies, Leprechauns, and Goblins: An Encyclopedia