DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Close-up of the inflamed penis head (glans) of a young boy. Known as balanitis, pus due to bacterial infection is seen exuding from the tip. The foreskin is excessively tight around the glans, a condition known as phimosis, which can exacerbate balanitis.
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