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.
Bacteria. Most skin boils are caused a bacteria called Staphylococcus aureus (staph). Staph lives on the surface of normal skin and usually doesn't cause any problems. A tiny scratch or cut can let the bacteria in, though, and allow it to grow more than usual.radually, an area of the skin over the boil will thin and then rupture, allowing the pus to drain out. The pus is yellow or green and often smells foul. Boils can appear almost anywhere on the skin. They occur more often on hairy parts of the body, where the infection may begin in a hair follicle.