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.
Quick Answer. An infection of Staphylococcus aureus bacteria is the most common cause of boils, especially when transmitted through an open cut or insect bite, explains Mayo Clinic. For most boils, home treatment with a warm compress is sufficient to manage pain until the boil drains naturally. Continue Reading.