Why Is My Clitoris Enlarged? Causes & When to Worry

Clitoral enlargement usually reflects a shift in hormone levels, though structural causes and normal variation can also explain what you’re noticing. The clitoris is hormone-sensitive tissue, and androgens in particular can increase its size at any stage of life. In most cases the change is gradual and benign, but because some underlying causes do need medical attention, understanding the range of possibilities helps you decide whether and when to bring it up with a healthcare provider.

What Counts as “Normal” Size

Before assuming something is wrong, it helps to know that clitoral dimensions vary widely among healthy people. A study measuring the clitoris in women with no hormonal abnormalities found the average glans width was about 3.4 mm and the average glans length was about 5.1 mm, with a total clitoral length (glans plus shaft) averaging around 16 mm. The range was broad enough that a clitoris twice the average could still fall within normal limits.¹ Ethnicity, age, and body composition all influence baseline size. In newborns, for example, reference values differ substantially across populations, with Nigerian newborns averaging a clitoral length of about 7.7 mm compared to roughly 4 mm in several East Asian and European reference groups.²

The clinical term for an abnormally large clitoris is clitoromegaly, generally defined as a size more than two standard deviations above the mean for a given population. In newborns, that threshold is often cited as a length greater than 9 mm or a width greater than 5 mm, though cut-offs vary by gestational age and ethnic background.³ In adults, there is no single universally accepted cut-off. The practical takeaway: if you’ve always had a larger clitoris and have no other symptoms, that is likely just your anatomy. A change from your own baseline is what matters more than any absolute number.

Polycystic Ovary Syndrome and Other Hormonal Shifts

The most common acquired reason for clitoral enlargement in premenopausal adults is excess androgen production, and polycystic ovary syndrome (PCOS) is the most common source of that excess. PCOS affects a significant share of reproductive-age people and produces a range of androgen-driven symptoms like irregular periods, acne, and increased body hair. Research has found that clitoral length in people with PCOS is measurably greater than in controls, with a strong correlation between clitoral length and the degree of excess hair growth. In one study, clitoral length alone predicted the presence of PCOS in nearly all patients in the sample.⁴ For many people with PCOS, clitoral changes are subtle and may not be noticeable without measurement. If you already know you have PCOS, mild enlargement is a recognized part of the condition and not a separate emergency.

Beyond PCOS, other endocrine conditions can drive androgen levels higher. The adrenal glands produce androgens alongside cortisol, and a rare androgen-secreting adrenal tumor can cause clitoral enlargement along with facial hair growth, acne, and sometimes irregular periods or high blood pressure.⁵ Certain ovarian tumors, particularly a type called Sertoli-Leydig cell tumors, can also flood the body with testosterone. These tumors tend to cause rapid, dramatic virilization: a deepening voice, significant facial hair growth, and noticeable clitoral enlargement over weeks to months.⁶ The good news is that testosterone levels typically return to normal after tumor removal, and Sertoli-Leydig cell tumors are the most commonly identified subtype in case series of virilizing ovarian tumors.⁷

Congenital Adrenal Hyperplasia

Congenital adrenal hyperplasia (CAH) is the single most common cause of clitoromegaly identified at birth. In its classic form, an enzyme deficiency causes the adrenal glands to produce excess androgens even before birth, which can enlarge the clitoris of a developing fetus. CAH is usually detected in newborn screening, but a milder, nonclassic form can go unnoticed for years. Nonclassic CAH is estimated to be over ten-fold more common in the general population than the classic form, and it may not show up until puberty or adulthood. Symptoms can look a lot like PCOS: early pubic hair, accelerated growth in childhood, acne, excess body hair, and clitoral enlargement.⁸ If you developed these signs around puberty or have a family history of CAH, it’s worth asking your doctor about hormone testing. Because untreated classic CAH can lead to a dangerous adrenal crisis, evaluating for CAH is a priority whenever clitoromegaly is found in infants.³

Medications and Exogenous Hormones

Anabolic-androgenic steroids are a well-documented cause. In a study of weight-trained women who used anabolic steroids, most reported clitoral enlargement alongside a deeper voice, more facial hair, increased aggression, and menstrual changes.⁹ Some of these effects, particularly voice deepening and clitoral growth, can be permanent or only partly reversible even after stopping the drugs. Among women who have used anabolic steroids, clitoral enlargement has been reported as a source of shame and reduced self-esteem, though a supportive partner response can soften the emotional impact.¹⁰

Testosterone therapy prescribed for gender-affirming care also produces clitoral growth as an expected and desired effect. One prospective study found that after six months of testosterone, the clitoral index (a measurement combining length and width) roughly doubled compared to baseline, alongside increased blood flow to the area.¹¹ For transmasculine individuals, this is a welcome change. The distinction matters: context determines whether the same physical change is a side effect, a symptom, or a goal.

Other medications with androgenic activity can occasionally contribute. Danazol, sometimes prescribed for endometriosis, and certain progestins with androgenic properties have been linked to clitoral growth in case reports. If you’re taking any hormonal medication and notice changes, mention it to your prescriber so the two of you can weigh the trade-offs.

Non-Hormonal Causes

Not every enlarged clitoris traces back to hormones. Local structural problems can mimic clitoromegaly or cause genuine swelling. A clitoral abscess, while rare, can produce painful swelling that looks like enlargement. Because it’s so uncommon, diagnosis is often delayed and it may be confused with other vulvar conditions.¹² Clitoral abscesses have also been reported as a complication of obstetric surgery and, in some settings, following genital cutting.¹³

Benign tumors growing in or around the clitoris are another possibility. Neurofibromas, which arise from nerve tissue, have been reported in the clitoral area in patients with neurofibromatosis. In one striking case, a neurofibroma of the clitoris grew to over 9 cm in a young child.¹⁴ Malignant tumors of the clitoris are extremely rare but have been documented in isolated case reports.¹⁵ Epidermoid cysts, lymphatic malformations, and hemangiomas are other structural causes that can produce visible swelling. In all of these, the enlargement tends to be asymmetric or focal rather than the diffuse, symmetrical growth you’d see with hormonal causes.

Finally, there’s idiopathic clitoral hypertrophy, which means enlargement with no identifiable hormonal or structural cause. In one documented case, thorough testing revealed no chromosome abnormalities, no hormone irregularities, no tumors, and completely normal internal anatomy.¹⁶ Sometimes the answer genuinely is “we don’t know why,” which can be frustrating but also reassuring if everything else checks out.

When to See a Doctor

A clitoris that has always been on the larger side and isn’t changing is unlikely to signal a problem. What warrants a visit is a noticeable change from your personal baseline, especially when it comes alongside other signs of androgen excess. The combination of clitoral growth with any of the following is a reason to get evaluated promptly:

New facial or body hair: particularly coarse, dark hair on the chin, upper lip, chest, or lower abdomen in a pattern that’s new for you.
Voice deepening: a lower pitch or hoarseness that develops over weeks to months.
Menstrual changes: periods becoming irregular or stopping altogether when they were previously predictable.
Rapid onset: if the enlargement progresses quickly (over weeks rather than years), this raises concern for a hormone-producing tumor and should be evaluated urgently.
Pain or tenderness: localized pain may point to an abscess, cyst, or other structural issue rather than a hormonal cause.
Visible mass or asymmetry: a lump that seems distinct from the surrounding tissue suggests a local growth rather than diffuse hormonal enlargement.

Rapid virilization in a postmenopausal person deserves particular urgency. After menopause, the ovaries and adrenals are the only significant sources of androgens, so a sudden spike often points toward a tumor.⁶

What Happens During a Medical Workup

If you bring this concern to a gynecologist or endocrinologist, expect a fairly systematic evaluation. Your doctor will start with a detailed history: when you first noticed the change, how quickly it progressed, any medications or supplements you take (including anything purchased without a prescription), menstrual history, and whether you’ve experienced other signs of androgen excess. A physical exam will include measurement of the clitoris and assessment of the rest of the genitalia, along with a check for excess hair growth using a standardized scoring method.

Blood work typically includes total and free testosterone, dehydroepiandrosterone sulfate (DHEA-S), and androstenedione. Elevated DHEA-S tends to point toward the adrenal glands, while very high testosterone with normal DHEA-S may implicate the ovaries. If CAH is suspected, an early-morning 17-hydroxyprogesterone level can help confirm or rule it out. Imaging, usually a pelvic ultrasound, comes next if hormone levels are abnormal, to look for ovarian or adrenal masses. If no hormonal or chromosomal explanation is found and imaging is clean, the case may be classified as idiopathic.¹⁶

Treatment Depends Entirely on the Cause

There is no single treatment for an enlarged clitoris because the right approach depends on what’s driving it. For PCOS, anti-androgen medications and hormonal contraceptives can lower circulating androgens and slow further growth, though they won’t necessarily reverse enlargement that has already occurred. For androgen-secreting tumors, surgery to remove the tumor is the primary treatment, and hormone levels generally normalize afterward.⁷ For CAH, glucocorticoid replacement suppresses the excess adrenal androgen production. Abscesses require drainage and antibiotics. Benign tumors may need surgical excision.

Surgical reduction of the clitoris itself, known as clitoroplasty, is sometimes performed when the enlargement causes physical discomfort, pain with clothing or activity, or significant distress. Modern techniques prioritize preserving the nerve supply. Nerve-sparing clitoroplasty has been reported to resolve pain while maintaining the ability to engage in sexual activity.¹⁷ A ventral approach, which works from underneath and avoids the nerve-rich dorsal surface, has shown good outcomes in small series, with patients reporting satisfaction with both appearance and sexual function and no enlargement recurring over two years of follow-up.¹⁸ Still, any surgery on the clitoris carries a risk of altered sensation, and outcomes depend heavily on the surgeon’s expertise. The decision should be made collaboratively between you and a specialist with experience in this area, weighing the functional risks against the physical or psychological symptoms you’re experiencing.

The Emotional Side

Changes to genital appearance can be deeply distressing, and that distress is valid regardless of whether the underlying cause turns out to be medically serious. Research on women who developed clitoral enlargement from anabolic steroid use found that shame and reduced self-esteem were common, though a partner’s accepting response helped.¹⁰ For many people, the hardest part isn’t the physical change itself but the anxiety about what it might mean and the awkwardness of discussing it with a provider.

Healthcare providers vary in how comfortable they are examining and discussing genital anatomy. If your first provider seems dismissive or unfamiliar with the differential diagnosis, seeking out a gynecologist or endocrinologist with experience in androgen disorders is reasonable. You don’t need to accept “it’s probably nothing” without any workup, but you also don’t need to panic. Most causes of clitoral enlargement are treatable, and many are benign.

Surgical Interventions in Infancy and the Ethics Debate

When clitoromegaly is identified in a newborn, the question of whether and when to operate has become one of the most contested issues in pediatric surgery and bioethics. For decades, early surgical reduction was standard practice based on the assumption that typical-appearing genitalia would improve psychological outcomes. That assumption has come under intense scrutiny. A systematic review of medical literature on these surgeries found that the majority of published studies did not provide a clear rationale for why the procedure was performed in infancy rather than deferred, and over half did not acknowledge any controversy surrounding the intervention at all. The rationales that were given included parental preference, cosmetic concerns, and a goal of aligning genital appearance with the sex assigned at birth.¹⁹

Multiple human rights bodies have called for a moratorium on elective, irreversible genital surgery in infants and children who cannot consent, arguing that these procedures should be deferred until the individual is old enough to participate in the decision. Surgical techniques have improved, and nerve-sparing methods offer better outcomes than older approaches.²⁰ But the fundamental question of whether cosmetic genital surgery on a child who cannot consent is ethically justified remains unresolved in much of the medical community. For adults making decisions about their own bodies, this debate is less relevant, but for parents navigating a newborn diagnosis of clitoromegaly from CAH or another cause, the disagreement between surgical tradition and rights-based advocacy is something worth understanding before consenting to any procedure.

1
PubMed. Clitoral size in normal women
2
Acta Paediatrica. Country-based reference values and international comparisons of clitoral size in healthy Nigerian newborn infants
3
PubMed Central. Congenital Clitoromegaly With Concurrent Congenital Adrenal Hyperplasia and Turner Syndrome: A Case Report
4
PubMed. Clitoral and labial sizes in women wıth PCOS
5
PubMed Central. Isolated DHEAS production by an adrenal neoplasm: Clinical, biochemical and pathologic characteristics
6
PubMed. Sertoli-Leydig cell tumour of the ovary–a rare cause of virilization after menopause
7
Endocrine Connections. Virilising ovarian tumors: a single-center experience
8
Oxford Academic. Approach to the Virilizing Girl at Puberty
9
PubMed. Anabolic steroid use and perceived effects in ten weight-trained women athletes
10
PubMed. Anabolic-androgenic steroid use among women – A qualitative study on experiences of masculinizing, gonadal and sexual effects
11
The Journal of Sexual Medicine. Evaluation of Clitoral Size and Clitoral Artery Blood Flow in Transgender Men Undergoing Testosterone Therapy: A Prospective Study
12
International Journal of Reproduction, Contraception, Obstetrics and Gynecology. Clitoral abscess presenting as benign clitoral swelling in an adolescent: a gynecologist’s Halley’s comet
13
PubMed Central. Acquired Clitoromegaly: A Gynaecological Problem or an Obstetric Complication?
14
PubMed Central. Neurofibroma of the external genitalia, extreme enlargement of the clitoris
15
PubMed Central. Rare Malignant Tumors of Clitoris-a Case Report
16
PubMed Central. A Case of Clitoral Hypertrophy of Unknown Origin
17
PubMed. Nerve Sparing Clitoroplasty is an Option for Adolescent and Adult Female Patients with Congenital Adrenal Hyperplasia and Clitoral Pain following Prior Clitoral Recession or Incomplete Reduction
18
PubMed Central. Neurovascular bundle-sparing ventral clitoroplasty in adult patients: description of the technique and long-term outcome on clitoral functions
19
PubMed Central. Perspectives on conducting “sex-normalising” intersex surgeries conducted in infancy: A systematic review
20
African Journal of Urology. Is nerve sparing clitoroplasty really a nerve sparing?