Pilonidal sinus—also called a pilonidal cyst—is a skin infection that occurs in or around the crease of your buttocks. This condition happens when hair, skin cells, and dirt clog a hair follicle, ...

Skin cysts, or sebaceous cysts, are slightly hardened, fluid-filled bumps under the skin. When a person feels them, they are moveable. They often affect the face, neck, and torso. The term “sebaceous ...

A 27-year-old man will have a scar on his face for the rest of his life, after what he thought was a pimple turned out to be an infected cyst. In late 2024, Kai Davidson noticed a small lump on the ...

Imaging, specifically cone-beam CT (CBCT), helped clinicians remove an ectopic third molar and an infected cyst from a patient's maxillary sinus, which is a rare site for a tooth to erupt, according ...

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Ingrown hairs can cause a cyst, which is a fluid-filled lump. Home remedies and medical treatments may help manage an ingrown hair cyst. An ingrown hair occurs when the hair grows downward instead of ...

An infected ingrown hair — also known as folliculitis — typically looks like a bump, a hard lump, or a cyst under the skin. It may contain pus. You can usually treat them at home. An infected ingrown ...

CD8+ cytotoxic T lymphocytes can kill host cells infected with various microorganisms and single individual cancer cells through direct cell-to-cell contact, but their ability to destroy a target of ...

Different types of belly button infections can cause different symptoms, but most skin infections cause redness, tenderness or pain, and swelling. You may also have pus, drainage or discharge, or skin ...