An<unk>  is a collection of pus that has built up within the tissue of the body. Signs and symptoms of<unk> es include redness,<unk> in, warmth, and swelling. The swelling may feel fluid-filled when pressed. The area of redness often extends beyond the swelling. Carbuncles and boils are types of<unk>  that often involve hair follicles, with carbuncles being larger. They are usually caused by a bacterial infection. Often many different types of bacteria are involved in a single infection. In many areas of the world, the most common bacteria present is methicillin-resistant Staphylococcus aureus. Rarely,<unk> rasites can cause<unk> es; this is more common in the developing world. Diagnosis of a skin<unk>  is usually made based on what it looks like and is confirmed by cutting it open. Ultrasound imaging may be useful in cases in which the diagnosis is not clear. In<unk> es around the anus, computer tomography (CT) may be important to look for deeper infection. Standard treatment for most skin or soft tissue<unk> es is cutting it open and drainage. There appears to be some benefit from also using antibiotics. A small amount of evidence supports not<unk> cking the cavity that remains with gauze after drainage. Closing this cavity right after draining it rather than leaving it open may speed healing without increasing the risk of the<unk>  returning. Sucking out the pus with a needle is often not sufficient. Skin<unk> es are common and have become more common in recent years. Risk factors include intravenous drug use, with rates reported as high as 65% among users. In 2005, in the United States, 3.2 million people went to the emergency department for an<unk> . In Australia, around 13,000 people were hospitalized in 2008 with the condition.
Abscess
Necrotizing fasciitis
Dilaceration
Cellulitis
Joint effusion
Sebaceous cyst
Thrombus
Phlegmon