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A '''frenulum''' (or '''frenum''', plural: '''frenula''' or '''frena''', from the Latin ''frēnulum'', meaning "little bridle") is a small fold of tissue that binds movable structures to non-movable structures in the body. In the human body, examples of frenula include the frenulum linguae, under the tongue, the frenulum labii superioris inside the upper lip, and the ''frenulum labii inferioris'' inside the lower lip. The word ''frenulum'' on its own is often used for the frenulum in the human [[penis]], which is an elastic band of tissue under the [[glans penis]] that connects to the [[foreskin]] to the vernal [[mucosa]], and helps contract the prepuce over the glans. This is sometimes colloquially known as the "banjo string".

In the event of [[frenulum breve]] or frenular chordee, or to ensure that the [[glans ]] can be freely and completely exposed, the frenulum may be partially or totally removed. It is also often removed in a [[circumcision]].<ref name="Griffin-Kroovand1990">{{REFjournal

}}</ref> It has been noted that the wound where the frenulum was amputated is usually slower to heal than the wound where the [[foreskin ]] was amputated.

Song et al. (2015) report that the frenulum may need to be lengthened after a [[circumcision ]] amputates [[skin]] tissue from the [[penis]].<ref>{{REFjournal

Rarely, boys are born without a frenulum. This condition causes no issues and permits unusually full retraction of the [[foreskin]].

It may be missing in men who were [[circumcised ]] at birth, as it is often crushed and cut away, or broken during infant circumcision. Men who are circumcised as adults may specify whether or not they wish to preserve their frenulum. The frenulum was reported to be cut in 26.7%, 20%, and 33.33% of circumcised patients in various surveys.<ref name="Griffin-Kroovand1990"/><ref name="Gary2000"/>