Pimple, illustration
Illustration of a pimple on a girl's face. A pimple is caused by the pore of a hair follicle becoming blocked by sebum. Sebum, produced by sebaceous glands within the skin, is an oily substance that lubricates and protects the skin. Overproduction of sebum can lead to blocked pores, which allow bacteria present to multiply, causing inflammation and a pimple or pustule., by DESIGN CELLS/SCIENCE PHOTO LIBRARY
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