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 ...

Eva-Maria Frickel is at the Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham B15 2TT, UK, and at the Francis Crick Institute, London, UK. Toxoplasma ...

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 ...