The labia minora are the two thin, hairless folds of skin that sit inside the outer lips (labia majora) of the vulva. They start just above the clitoris and extend downward past the vaginal opening to the perineum, the small patch of skin between the vagina and anus. Often called the “inner lips,” they serve as a protective covering for the vaginal and urethral openings and play an active role in sexual sensation.
Location and Structure
The labia minora are part of the vulva, which is the external portion of the female genitalia. Unlike the outer lips, the inner lips have no hair follicles and no sweat glands. They’re covered in a thin layer of skin that’s much more sensitive and delicate than regular body skin. This tissue fills with blood during arousal, causing the labia to swell and part slightly, exposing the vaginal and urethral openings that they normally cover in a resting state.
The tissue is densely packed with three types of nerve endings: free nerve endings that detect pain and temperature, plus two specialized types that respond to light touch and deep pressure. The inner edge of the labia minora, closest to the vaginal opening, contains significantly more nerve endings than the outer edge. This concentration of nerves makes the area highly responsive to touch and central to sexual sensation and arousal.
Size, Shape, and Normal Variation
Labia minora vary enormously from person to person in length, width, color, and symmetry. There is no single “normal” appearance. Researchers studying 400 women identified at least six distinct shape categories, including small, willow leaf, butterfly wing, protruding, rhombus, and fan-shaped varieties, along with various patterns of asymmetry where one side differs from the other. Having uneven labia minora is common and not a medical concern.
Color ranges from pink to brown to dark purple, and it’s typical for the labia to be darker than surrounding skin. Some people have labia minora that are barely visible, tucked entirely within the outer lips. Others have inner lips that extend well beyond the outer lips. Both extremes and everything in between fall within the range of normal anatomy. One older clinical reference defined “hypertrophy” as inner lips wider than 5 centimeters from midline to free edge, but there are no agreed-upon diagnostic criteria among medical professionals, and size alone doesn’t indicate a problem.
How They Change Over Time
The labia minora go through visible changes at key hormonal stages of life. Before puberty, they’re small and thin. During puberty, rising hormone levels cause them to grow larger and thicker, becoming more prominent and easily visible. The skin also changes at the cellular level, becoming more resilient.
After menopause, declining estrogen reverses some of these changes. The tissue gradually thins out, loses elasticity, and becomes paler in color. The labia may appear smoother and less defined in outline. The skin also becomes more fragile and more prone to small tears from friction or minor contact, which is a direct result of lower estrogen levels affecting skin throughout the body.
Common Sources of Irritation
Because the skin of the labia minora is thin and sensitive, it’s particularly vulnerable to irritation. Contact dermatitis is one of the most frequent issues. Scented soaps, vaginal sprays, douches, detergents, fabric softeners, and spermicides can all trigger burning, itching, and discharge. If symptoms appear after you start using a new product, that product is the likely culprit, and stopping use typically resolves the problem.
Yeast infections are another common cause of labial discomfort. When the naturally occurring fungus in the vagina overgrows, it produces a thick, white, cottage cheese-like discharge along with itching and redness of the vulva and labia. Antibiotics, pregnancy, poorly controlled diabetes, and corticosteroid medications all increase the risk of yeast overgrowth.
Cleaning and Daily Care
The labia minora require very little in the way of special care, and in fact, less is more. Guidelines from UW Medicine recommend cleaning the vulvar area with warm water and your hand only. No soap, no washcloth. Soap disrupts the natural balance of the area and can cause irritation, even products marketed as “gentle” or “pH-balanced.”
A few other practical recommendations worth knowing:
- Drying: Pat gently with a towel rather than rubbing, or use a hairdryer on the cool setting.
- Toilet paper: Use white, unscented varieties.
- Menstrual products: Avoid scented pads or tampons, and limit pad use to your heaviest days when possible.
- Hair removal: Shaving and chemical depilatories can damage the delicate vulvar skin.
- Douching: Never necessary and consistently linked to irritation and disrupted vaginal flora.
The labia minora are self-maintaining in most respects. The vagina cleans itself through natural discharge, and the labia benefit from that same hands-off approach. Overwashing or using harsh products is far more likely to cause problems than to prevent them.