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 be caused by an ingrown hair, a foreign material stuck in the skin such as a splinter, and also clogged sweat glands. How is a boil different from pimple? Pimples are caused by a blockage in a hair follicle. They usually affect the face, chest or back where oil glands become overactive and clog follicles.