An abscess is a collection of pus surrounded (walled-off) by damaged and inflamed tissue.
An abscess can occur anywhere on the body.
An example of an abscess on the skin is a boil, which is usually caused by the bacterium staphylococcus aureus.
A definition of abscess is included in this section because it is a type of skin lesion. Study of skin lesions is required as part of many courses in aspects of health and holistic therapies, especially bodywork therapies.