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What to know about pustules

Medically reviewed by Elaine K. Luo, M.D. — Written by Jenna Fletcher on May 31, 2019
Causes
Where do they occur?
Pustule vs. other pimples
Treatment
Home remedies
Prevention
Outlook
Pustules are a type of pimple that contains yellowish pus. They are larger than whiteheads and blackheads.
Pustules appear either as red bumps with white centers or as white bumps that are hard and often tender to the touch. In many cases, the skin around the pustules is red or inflamed.
In this article, we look at the causes, appearance, and treatment of pustules.
What causes pustules?
Share on PinterestA clogged pore is the root cause of a pustule.
A clogged pore is the root cause of any pimple, including pustules. Oil, bacteria, or dead skin can block the pore.
Pustules occur when the walls of the affected pore or pores begin to break down. As a result, pustules tend to be bigger than whiteheads and blackheads.
Acne and folliculitis are common causes of pustules. However, pustules can also occur in people with certain types of psoriasis, such as palmoplantar pustulosis, and those with some forms of eczema, including dyshidrotic eczema.
Pustules contain pus because the body is trying to fight against the dirt or bacteria that has entered the pore. Pus is a natural product of the immune system, which consists mostly of dead white blood cells.
Where do they occur?
Pustules can occur anywhere, but they are more common on areas of the body that become oily, such as the face and neck, and areas that get sweaty, such as the armpits, chest, and pubic area.
People often notice pustules around the following body parts:
face
neck
chest
underarms
hairline
back
shoulders
pubic area
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