Avoid unnecessary tests and antibiotics by applying evidence-based, cost-conscious infectious-disease decision-making, with ...

Medically reviewed by Jennifer Schwartz, MD Key Takeaways Pus forms when the immune system's white blood cells fight an infection.Pus can be different colors and may emit a foul odor if the infection ...

A skin abscess or boil is a bump on or below the skin’s surface. It may look like a pimple but larger and deeper under the skin. Abscesses usually contain pus or clear fluid and can appear anywhere on ...

An abscess is a pus filled, swollen tissue. It is caused by a bacterial infection. The body’s response to the infection is sending white blood cells to fight the bacteria. This results in the ...

A cyst is a sac or cavity that may be filled with pus, semi-solid material, or air. It doesn’t usually cause pain until it gets large. An abscess is a painful, red infection that’s filled with pus. A ...

An abscess occurs when an infection causes a pocket of pus to develop. Abscesses can develop on the skin, in the mouth, or inside the body. Bacterial infections typically cause abscesses. Pus develops ...