Toxicodendron radicans, commonly known as eastern poison ivy or poison ivy, is a poisonous Asian and North American flowering plant that is well known for causing an itching, irritating, and sometimes painful rash in most people who touch it, caused by urushiol, a clear liquid compound in the plant's sap.
Boil: Introduction. A boil is a large infection of a hair follicle, the tiny opening in the skin from which a hair grows. Boils are due to an invasion of bacteria that enter the follicle and cause a bacterial infection of the follicle and nearby skin. Boils are also called skin abscesses or furuncles.
Boils can occur anywhere on the skin, although they tend to develop on the face, neck, armpits, buttocks, or thighs. They also occur most frequently in areas containing hair and/or sweat glands, or in areas where chafing or recurrent friction occurs, thus a major cause of skin boils.