What Is Found Around the Vaginal Opening? A Guide to Vulvar Anatomy and the Hymen
Many women and girls have questions about what they see around the vaginal opening. The terminology can also be confusing because people often use the word “vagina” to describe the entire external genital area.
Medically, the vulva is the external genital area. It includes the labia, clitoris, urethral opening and vaginal opening. The vagina is the internal muscular canal that begins at the vaginal opening and extends upward toward the cervix.
Understanding the normal anatomy can make it easier to recognize normal variation and know when a symptom or anatomical difference deserves medical attention. The hymen is one part of this anatomy, but its appearance varies considerably and it cannot be used to determine whether someone has had sexual intercourse.
What Is the Vulva?
The vulva is the group of external genital structures visible around the openings of the urinary and reproductive tracts.
It includes:
Labia majora, or outer folds
Labia minora, or inner folds
Clitoris and clitoral hood
Urethral opening
Vaginal opening
Hymenal tissue around the vaginal opening
Other small glands and surrounding tissues
The vulva differs naturally from person to person. The size, shape, color and symmetry of the labia can vary, and changes can also occur with puberty, pregnancy, aging and hormonal changes.
Vulva and Vagina Are Not the Same
This distinction is important.
The vulva is external.
The vagina is an internal, flexible muscular canal. Its lower end opens externally through the vaginal opening, while its upper end connects with the cervix.
Therefore, when someone asks what is “found in the vaginal area,” they may actually be asking about the vulva rather than the vagina itself.
What May Be Seen When the Labia Are Gently Parted?
When the external folds are gently separated, several structures may be visible.
The exact appearance differs between individuals, and some structures are easier to see than others.
1. Labia Majora
The labia majora are the outer folds of skin surrounding the other external genital structures.
After puberty, they commonly develop pubic hair. Their size, color, fullness and symmetry vary naturally.
One side may be somewhat different from the other. This does not automatically indicate a medical problem.
2. Labia Minora
The labia minora are the inner folds located inside the labia majora.
They surround the openings of the urethra and vagina and can differ substantially in length, width, color and shape.
It is normal for the labia minora to extend beyond the outer labia in some women and remain mostly covered in others.
3. Clitoris
The clitoris is located toward the upper part of the vulva, above the urethral opening.
The small visible portion is called the glans of the clitoris. Much of the clitoris extends internally beneath the surrounding tissues.
The clitoris contains abundant nerve tissue and is an important sensory structure. The visible portion may be partly covered by the clitoral hood.
4. Urethral Opening
The urethral opening is the opening through which urine leaves the body.
It is generally located below the clitoris and above the vaginal opening.
The urethra connects the bladder to this external opening. Because the urethral opening can be small and partly hidden by surrounding tissue, it may not always be easy to identify without a medical anatomy diagram or examination.
5. Vaginal Opening
The vaginal opening, also called the vaginal introitus, is the lower opening of the vagina.
Menstrual blood leaves the body through this opening. It is also the opening through which a baby passes during vaginal birth.
The appearance and size of the opening vary naturally. The labia may partly cover it, particularly when the legs are together.
What Is the Hymen?
The hymen is a thin tissue structure associated with the entrance to the vagina.
It usually partially surrounds the vaginal opening rather than forming a solid barrier across it. Its shape and amount of tissue vary naturally.
Common anatomical variations include:
Crescent-shaped or rim-like tissue
Annular tissue surrounding much of the opening
Septate hymen, with a band of tissue across the opening
Microperforate hymen, with a very small opening
Cribriform hymen, with several small openings
Imperforate hymen, in which there is no opening
ACOG describes these as variations in hymenal anatomy rather than evidence of a person's sexual history.
Does Everyone Have the Same Hymen?
No.
Hymenal anatomy varies naturally. Some people have only a small amount of visible hymenal tissue. Some have a more prominent rim, while others may have a shape that is difficult to identify without clinical examination.
Some people may also have little or no obvious hymenal tissue.
These differences are not, by themselves, signs of disease.
Can the Hymen Tell Whether Someone Has Had Sex?
No.
This is one of the most important facts about hymenal anatomy.
The presence, absence, size or appearance of the hymen cannot establish whether someone has had sexual intercourse.
Hymenal tissue can stretch or change for different reasons, and an intact-looking hymen does not prove that intercourse has not occurred. Conversely, a hymen that appears different or has less visible tissue does not prove that intercourse has occurred. ACOG states that hymenal appearance does not indicate “virginity,” and WHO states that there is no scientific examination that can prove whether a woman or girl has had vaginal intercourse.
For this reason, so-called “virginity testing” has no valid medical basis.
Can the Hymen Change?
Yes.
Hymenal tissue can stretch or change over time. Changes may occur naturally and can also occur with activities or procedures that place pressure on the area.
However, it is inaccurate to describe the hymen simply as something that always “breaks” during first intercourse.
ACOG notes that hymenal tissue may tear or stretch with vaginal sex, tampon use, sports activities or medical procedures.
The amount of bleeding during first vaginal intercourse also cannot be predicted from hymenal anatomy.
What Is an Imperforate Hymen?
An imperforate hymen is a congenital anatomical variation in which the hymen completely blocks the vaginal opening.
It is present from birth, although it may not cause noticeable problems until puberty.
The problem becomes medically important when menstrual blood begins to be produced but cannot leave the vagina normally. Blood may accumulate inside the vagina and, depending on the degree and location of obstruction, may also cause enlargement of the uterus.
What Symptoms Can an Imperforate Hymen Cause?
An imperforate hymen may cause symptoms around the time menstrual periods would normally begin.
Possible symptoms include:
No menstrual period despite other signs of puberty
Recurrent or increasing lower abdominal or pelvic pain
A feeling of fullness or pressure
Lower abdominal swelling or a mass
Back pain
Difficulty passing urine
Difficulty with bowel movements
The symptoms occur because menstrual blood cannot leave normally.
Not every adolescent with delayed menstruation has an imperforate hymen. Hormonal conditions, differences in reproductive anatomy and other medical causes can also lead to absent periods.
What If There Is No Period by the Expected Age?
A delayed first period should not automatically be attributed to the hymen.
Primary amenorrhea can have many causes, including hormonal conditions and congenital differences involving the reproductive tract.
A healthcare professional can determine whether the anatomy is normal and whether further evaluation is necessary.
Medical assessment is particularly important when absent periods occur together with cyclic pelvic pain, abdominal swelling, urinary symptoms or other signs suggesting an obstruction.
How Is an Imperforate Hymen Diagnosed?
Diagnosis generally involves a medical history and physical examination.
A healthcare professional may assess:
Pubertal development
Menstrual history
Pelvic or abdominal pain
Urinary or bowel symptoms
The external genital anatomy
Imaging, such as pelvic ultrasound, may sometimes be used when the diagnosis is uncertain or another anatomical condition needs to be excluded.
This distinction matters because not every obstruction near the vaginal opening is caused by an imperforate hymen. Other possibilities include labial adhesions, a transverse vaginal septum and other congenital anatomical differences.
How Is an Imperforate Hymen Treated?
When an imperforate hymen causes obstruction, treatment is usually a minor surgical procedure that creates an adequate opening and removes excess obstructing hymenal tissue.
The precise procedure depends on the anatomy and clinical situation.
ACOG recommends appropriate evaluation to distinguish an imperforate hymen from other obstructive conditions before treatment.
An imperforate hymen is generally an isolated anatomical problem and, when appropriately treated, does not typically cause long-term problems with fertility, sexual function or pregnancy outcomes.
When Should You Seek Medical Advice?
A healthcare professional should evaluate symptoms such as:
No period despite otherwise progressing through puberty
Recurrent pelvic or lower abdominal pain
Increasing abdominal fullness or swelling
Difficulty urinating
Difficulty passing stool associated with pelvic pressure
A suspected blockage at the vaginal opening
Persistent or worsening genital pain
A new unexplained lump or swelling
Bleeding or discharge that is unusual for you
These symptoms do not necessarily mean there is a serious condition. They are reasons to seek appropriate assessment rather than trying to determine the diagnosis from appearance alone.
What Is Normal Variation?
There is considerable natural variation in vulvar anatomy.
Normal differences can include:
Different labial sizes
Unequal left and right sides
Different pigmentation
Labia minora that extend beyond the labia majora
A more or less visible clitoris
Different amounts and shapes of hymenal tissue
Changes in appearance after puberty, pregnancy and with aging
A photograph or comparison with an illustration cannot reliably determine whether an individual's anatomy is medically normal.
If there is pain, a new change, a persistent swelling or concern about menstruation or urinary function, a healthcare professional can provide a more appropriate assessment.
Important Facts About the Hymen
Remember these points:
The hymen is part of the anatomy around the vaginal opening.
Hymens naturally vary in shape and appearance.
Some people have very little visible hymenal tissue.
An imperforate hymen can completely obstruct menstrual outflow.
An imperforate hymen is a congenital anatomical variation.
The hymen does not determine whether someone has had sexual intercourse.
“Virginity testing” has no scientific or clinical validity.
Absent periods with pelvic pain or pressure should be medically evaluated.
Not every vaginal-opening obstruction is an imperforate hymen.
Normal vulvar anatomy varies considerably between women and across life stages.
Key Takeaways
The area commonly called the “vaginal area” is more accurately described as the vulva when referring to the external genital anatomy.
The vulva includes the labia, clitoris, urethral opening and vaginal opening. The vagina itself is an internal canal.
The hymen is thin tissue that usually partially surrounds the vaginal opening, and its appearance varies naturally. It is not a reliable indicator of sexual history.
An imperforate hymen is a rare congenital variation in which the vaginal opening is completely obstructed. It can become apparent after puberty when menstrual blood cannot leave normally, potentially causing pelvic pain, pressure or other symptoms.
If an adolescent has not started menstruating and develops recurrent pelvic pain, abdominal fullness or urinary symptoms, medical evaluation is appropriate.
Medical Disclaimer
This article provides general educational information about female reproductive anatomy and is not a diagnosis or substitute for individualized medical care. Anatomical appearance varies considerably, and symptoms such as pelvic pain, absent menstruation, swelling or urinary difficulties may have several possible causes. A qualified healthcare professional should evaluate persistent, severe or concerning symptoms.
Health Related Articles
Absent or irregular periods during adolescence can have several causes. For more information, see our guide to irregular periods in teenagers.
Changes in vaginal discharge can sometimes provide useful clues about vaginal health. Learn more in our guide to vaginal discharge colors, causes and when to seek care.
For a broader explanation of the female reproductive organs and how they function, see our guide to female reproductive system anatomy and functions.
External Resource Articles
For more information about normal vulvar anatomy, changes throughout life, and hymenal variations, see the American College of Obstetricians and Gynecologists (ACOG) guide to vulvovaginal health.
For detailed medical information about imperforate, microperforate and septate hymens, see the ACOG guidance on diagnosis and management of hymenal variants.
The World Health Organization explains why hymen examination cannot establish whether someone has had vaginal intercourse. See the WHO statement on eliminating virginity testing for further information.