Penile frenulum

The frenulum of the penis, often known simply as the frenulum (from Latin: frēnulum, lit. 'little bridle') or frenum, is a thin elastic strip of tissue on the underside of the glans and the neck of the human penis. In men who are not circumcised, it also connects the foreskin to the glans and the ventral mucosa. In adults, the frenulum is typically supple enough to allow manual movement of the foreskin over the glans and help retract the foreskin during erection. In flaccid state, it tightens to narrow the foreskin opening.

The penile frenulum is homologous to the clitoral frenulum in the female. It is similar to the lingual frenulum between the tongue's lower surface and the lower jaw, or the frenulum between the upper lip and the outside of the upper gum.

In some men, the frenulum may appear shorter than normal, a phenomenon known as frenulum breve. Treatment of frenulum breve may be non-surgical, or in other cases, especially with penile chordee, it may include frenulectomy or frenulum lengthening.