Pustules are a type of pimple filled with yellowish pus, often showing as red bumps with white centers that may feel tender. Pastules often appear on oily or sweaty areas such as the face, back, ...

The most common cause of pustules is acne, a skin condition that can clog skin pores with oil and dead skin cells. Pustules may also occur from an allergic reaction to food, environmental allergens, ...