The vestibular bulbs are two elongated masses of erectile tissue lying beneath the labia minora on either side of the vaginal opening. They are covered by the bulbospongiosus muscles and are the female counterpart of the bulb of the penis.
| Location | Superficial perineal pouch, along the sides of the vaginal orifice |
|---|---|
| Parts |
|
| Nerve Supply | Cavernous nerves; Pudendal nerve |
| Blood Supply | Artery of the bulb of the vestibule (internal pudendal artery) |
| Venous drainage |
|
| Lymphatic drainage |
|
Fill with blood during sexual arousal, narrowing and supporting the vaginal opening.
Their rich blood supply means injury during childbirth or trauma can cause a large vulval haematoma that may need drainage.
Bleeding into the vulva from tears or trauma involving the vestibular bulbs.
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