How do boils look like? -A boil is a skin infection that starts in a hair follicle or oil gland. At first, the skin turns red in the area of the infection, and a tender lump develops. After four to seven days, the lump starts turning white as pus collects under the skin.
A boil starts as a hard, red, painful lump usually about half an inch in size. Over the next few days, the lump becomes softer, larger, and more painful. Soon a pocket of pus forms on the top of the boil. These are the signs of a severe infection: The skin around the boil becomes infected. It turns red, painful, warm, and swollen. More boils may appear around the original one. A fever may develop. Lymph nodes may become swollen.