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Phimosis and ParaphimosisWhat Is It?In an uncircumcised male, the head of the penis is covered by a sheath of skin known as the foreskin. Phimosis is a condition in which the foreskin is tightly stretched around the head of the penis and cannot be pulled back freely. Phimosis can occur naturally. For example, in boys younger than age 4, it is normally difficult to retract the foreskin. However, in older boys and men, phimosis often is triggered by an infection under the foreskin (balanitis) or by other medical conditions such as diabetes. Paraphimosis occurs when a tight foreskin is pulled back behind the head of the penis and then becomes stuck. This can cause swelling, pain, and loss of blood flow to the tip of the penis. If the foreskin cannot be pushed back into its natural position, serious harm can occur.
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From Health A-Z, Harvard Health Publications. Copyright 2007 by the President and Fellows of Harvard College. All rights reserved. Written permission is required to reproduce, in any manner, in whole or in part, the material contained herein. To make a reprint request, contact Harvard Health Publications. Used with permission of StayWell.
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