Cover illustration & animation by Leo Mateus. Anatomical diagrams by Katja Tetzlaff.
Clinically reviewed by Kate Steinle, MSN, NP. Last updated 4/16/2026.
This article is for: transmasculine and nonbinary people considering or using testosterone HRT. This article covers: what bottom growth is, when it may happen, what it can feel like, and common options to discuss with a clinician. This article does not replace medical advice.
What to know about testosterone HRT and bottom growth
- Bottom growth on testosterone refers to genital (clitoral) growth that can occur as part of masculinizing hormone therapy.
- Most people on testosterone experience some degree of bottom growth, but the amount varies widely.
- It commonly starts within the first few months of starting testosterone, but timing varies.
- Size changes vary widely by person.
- Sensitivity and discomfort can happen early on.
- Some effects may be long-lasting or irreversible.
What is bottom growth on testosterone?
Bottom growth is a phrase that many transgender people use to describe the process of clitoral hypertrophy, or the clitoris growing in length and width while taking testosterone. Almost all folks will have some bottom growth as a side effect of testosterone hormone replacement therapy. People experience genital changes differently, which can depend on their doses of testosterone and testosterone levels.
What do clinicians want you to know about bottom growth?
Clinicians want patients to know that:
Here's the truth. We don't have much clinical info about bottom growth for transgender and nonbinary folks on T. But our clinicians have received lots of feedback on how gender-affirming hormone therapy affects trans men and nonbinary people, over decades of treating tens of thousands of patients. We have gathered key information on the effects of testosterone from experience working with and providing care to trans folks of many ages and body types.
How much bottom growth is typical?
"Bottom growth" typically means the clitoris and clitoral hood will get longer and/or wider. Typical bottom growth on testosterone therapy is approximately 1 to 4 cm in length. One small study about bottom surgery reported the average length of bottom growth measured from 2.5 cm to 4 cm in the study participants who eventually underwent surgery. Another study found that at one year, average growth was 4.6 cm.
When does bottom growth start on testosterone?
Bottom growth typically starts within a few months to a year of starting testosterone, depending on person and dose. For some, bottom growth is one of the first changes noticed while on T for their gender transition. Along with increased sex drive and muscle mass, clitoral lengthening is extremely common. Bottom growth varies widely from person to person.
Masculinizing changes can typically be noticed within the first year of T gender-affirming hormone replacement therapy. Clinical resources generally say changes start around three to six months, but this is only sometimes the case throughout the community. Typical guidance is that maximum growth is reached in the first year to three years, but this depends heavily on the individual and their T route and dosage.
Does bottom growth hurt or feel more sensitive?
Initially, the sensation of bottom growth can feel very sensitive. People commonly describe the feelings from these physical changes are pressure, slightly painful, itchy, hot-feeling, and hard all the time. One study found that the discomfort some people experienced with bottom growth resolved after six months of treatment. Bottom growth sensitivity also varies from person to person.
Hypersensitive growth can be uncomfortable when brushing against underwear. Some people try different underwear cuts (like boxers instead of briefs). Underwear made of softer fabrics can also decrease discomfort around your genitals. Or, try going underwear-free! Some folks also use lube or moisturizer to help.
In terms of sex drive, many describe changes in their orgasms and in the kind of touch that feels gratifying or pleasurable. Some people describe feeling a more erection-like sensation when aroused.
Can you get more bottom growth?
There are options for those looking for more bottom growth, but there is no sure-fire way to guarantee it will happen. There are a few strategies that people have told us that work for them to enhance bottom growth. You can use a clitoral pump to increase the size of bottom growth. Pumps can be used before starting T or while on T. Some folks find using lube while pumping helpful.
Many use DHT cream (dihydrotestosterone cream). DHT cream is applied directly to the genital area. This treatment uses a testosterone-based substance to induce growth. DHT cream is NOT the same as testosterone gels prescribed for HRT (hormone replacement therapy). DHT creams are compounded (specifically mixed) by specialty pharmacies. Testosterone gels contain alcohol, which can cause irritation and pain when used on genital tissues. FOLX can send a prescription for T cream to a compounding pharmacy.
Can you reduce or prevent bottom growth?
Some considerations exist for people who don't necessarily want bottom growth with T. First and foremost, each person has a unique response to hormones. However, there are options for those who want to start T but aren't so keen on bottom growth. If someone is experiencing bottom growth that feels excessive or rapid, they can adjust to a lower T dosage to manage these side effects.
Some people on T will also take finasteride (a medication used to reduce DHT) or dutasteride to keep bottom growth minimal. Finasteride blocks the conversion of testosterone into a more potent androgen called DHT -- it is commonly used to prevent hair loss on the head (balding). Still, people have also used it to minimize bottom growth. It's important to note that finasteride has other side effects - it may decrease body hair or facial hair growth and potentially restart menstruation, which may or may not be ideal for your other gender transition goals on testosterone.
Is bottom growth reversible after stopping testosterone?
Whether or not bottom growth reverses after stopping testosterone depends on the person. The standard advice is that bottom growth is not reversible once it starts. However, anecdotally, we have heard from people who weren't on T for a long time, were on low doses, or didn't have a large amount of growth, that bottom growth reverted completely (or almost entirely) after stopping T.
For those ready to get started with FOLX for testosterone, sign up for a membership. For existing FOLX members with questions about what they're currently experiencing with T, don't hesitate to message or schedule time with a clinician. And for those who've just got some more questions, read up on testosterone in the Library.
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FOLX Health is the first digital healthcare company designed by and for the LGBTQIA+ community. Our services include virtual primary care, gender-affirming hormone therapy including estrogen and testosterone (HRT), mental health care, sexual and reproductive health care, preventive care, and fertility consultations. FOLX memberships give you access to LGBTQIA+ expert clinicians, peer support, thousands of LGBTQIA+ resources, and more. Whether you’re lesbian, gay, bisexual, transgender, queer, gender non-conforming, or nonbinary, you can find LGBTQIA+-specialized health care that helps you meet your wellness goals. FOLX Health is health care that's queer all year. Get all the benefits of becoming a FOLX member and sign up today!
FAQs
How soon does bottom growth start on testosterone?
Bottom growth can start within the first few months of testosterone therapy, though timing varies from person to person. Clinical guidance often cites changes beginning around 3–6 months, but some people notice it earlier, while others take longer. Growth typically continues over the first 1–3 years.
How much bottom growth happens on average?
Bottom growth varies widely, but typical estimates range from about 1 to 4 cm. Some studies report average lengths closer to 2.5–4.6 cm after extended testosterone use. Individual results depend on factors like genetics, hormone levels, and duration of therapy.
Is bottom growth permanent?
Bottom growth is generally considered permanent once it occurs. However, there are anecdotal reports of partial or near-complete reversal in people who stop testosterone early or were on low doses. Outcomes vary, and there isn’t strong clinical data on reversibility.
Does bottom growth happen on low-dose testosterone?
Yes, bottom growth can still occur on low-dose testosterone (also called microdosing). Lower doses may slow the rate or reduce the extent of growth, but they do not reliably prevent it. Individual responses to testosterone vary, so it’s difficult to predict exactly what will happen.
Can finasteride reduce bottom growth?
Finasteride may reduce or slow bottom growth for some people. It works by blocking the conversion of testosterone into DHT, a hormone involved in genital growth. However, it can also affect other masculinizing changes, such as body hair growth, and may not fully prevent bottom growth.
Is bottom growth painful?
Bottom growth isn’t always painful, but it can feel uncomfortable, especially early on. People often report increased sensitivity, pressure, or irritation as the tissue changes. This discomfort typically improves over time, though experiences vary.
Does everyone on testosterone get bottom growth?
Most people on testosterone experience some degree of bottom growth, but the extent varies widely. A small number of people may notice minimal changes, while others experience more significant growth. There’s no way to predict exactly how an individual will respond.
