Changes

[[Circumcised]] males may experience tight and/or painful erections if there is insufficient residual shaft [[skin]] to permit full expansion and extension of the shaft of the [[penis]] during erection. [[Tissue expansion]] may relieve the pain and tightness.

== Video==

=== How does an erection occur in men ? ===

<youtube>v=52vH6gDUVI8</youtube>

{{REF}}

[[Category:Medical term]]

[[Category:Male sexuality]]

[[Category:Physiology]]