20 Warning Signs of a Staph Infection And What to Do About Them

6. Boils

Boils are one of the most common and recognizable symptoms of a staph infection. These painful, swollen lumps occur when bacteria enter the skin, often through hair follicles or oil glands, and trigger a localized infection. The immune system responds by sending white blood cells to fight the bacteria, resulting in the accumulation of pus—a mixture of dead bacteria, white blood cells, and tissue debris. Boils typically appear red and inflamed, and as the infection progresses, the center of the boil may become soft or develop a yellow or white head. In severe cases, boils can cause fever, fatigue, and lymph node swelling. Without treatment, the infection may spread to surrounding tissues, leading to cellulitis. Proper hygiene and prompt medical attention can prevent complications and encourage faster healing.