If your skin has gotten oilier or you have noticed new breakouts since starting testosterone replacement therapy (TRT), you are not imagining it, and you are not alone. Acne and oily skin are among the side effects listed on testosterone product labeling and in the Endocrine Society's clinical practice guideline for testosterone therapy. Here is why it happens, how it can differ between injectable and topical forms, and what options exist if it bothers you.
This article is patient education, not medical advice. It does not create a doctor-patient relationship and is not a substitute for an individualized evaluation from a licensed clinician who knows your health history.
Why testosterone therapy can change your skin
The sebaceous glands in your skin, the small glands that produce the oil (sebum) that keeps skin lubricated, are sensitive to androgens, the class of hormones that includes testosterone. When testosterone levels rise, whether through the body's own production or through replacement therapy, those glands can respond by producing more sebum. More oil on the skin's surface, combined with normal shedding of skin cells, can clog pores and set the stage for acne.
This is the same basic mechanism behind the acne many people experience during puberty, when testosterone and other androgens rise naturally. TRT does not introduce a new or different skin process; it can simply turn up the same androgen-driven signal in someone whose testosterone was previously low.
Acne and oiliness: how common, and why it happens
Not everyone on TRT develops acne, and the degree varies widely from person to person. Factors that appear to influence it include the dose, how quickly testosterone levels rise, individual skin type, and whether someone was prone to acne earlier in life. People who had acne as teenagers may be more likely to notice a recurrence on TRT, though this is not universal.
Skin changes are often most noticeable in the first several months of therapy, while the body is adjusting to a new hormonal baseline, or shortly after a dose increase. For some people it levels off as treatment continues; for others it persists and is worth actively managing. If you are also tracking other early changes, our guide to how long testosterone therapy takes to work covers the general timeline for both benefits and side effects during the early months.
Injectable testosterone and skin changes versus topical forms
How testosterone is delivered can influence how skin responds. Injectable testosterone can produce a higher peak hormone level in the days shortly after an injection, compared with the steadier, more gradual levels typical of daily topical application. Some people notice that acne flares seem to track those peaks, appearing or worsening in the days after a shot and settling down as levels taper before the next dose.
This pattern is not universal, and it depends on the specific dose and injection interval your clinician has prescribed. If you are comparing formulations for other reasons, our overview of injectable vs. topical vs. oral testosterone walks through how each form is typically dosed and monitored, which can help put a skin-related pattern in context when you talk to your clinician.
| Form | Typical hormone pattern | Skin-related consideration |
|---|---|---|
| Injectable | Peaks shortly after injection, tapering before the next dose | Some people notice acne tracking those peaks |
| Topical gel or solution | Steadier day-to-day levels with daily application | Possible application-site irritation; secondary-exposure precautions apply |
Topical testosterone: application-site reactions and secondary exposure
Testosterone gel and solution products are applied daily to the skin, usually the shoulders, upper arms, or abdomen, and absorbed into the bloodstream. Beyond the acne and oiliness discussed above, topical forms carry their own skin-specific considerations: some people notice redness, itching, or irritation right at the application site.
More importantly, topical testosterone products carry FDA boxed warnings about the risk of secondary exposure. Because testosterone can transfer from treated skin to another person through direct skin contact, labeling for these products describes covering the application site with clothing once the product has dried and washing your hands thoroughly after each application, to reduce the chance that a partner or child absorbs testosterone from your skin. If you are using a topical form, ask your clinician to walk through the application instructions in detail, including when it is safe for others to have skin contact with the treated area.
What a dose adjustment or dermatology referral can look like
If acne or oiliness is bothering you, it is worth raising with your prescribing clinician rather than treating it as something you simply have to live with. Clinicians sometimes address testosterone-related acne with standard dermatologic approaches, such as over-the-counter or prescription topical benzoyl peroxide, a topical retinoid, or other acne treatments a dermatologist might otherwise recommend for hormonally driven breakouts.
In other cases, the more direct lever is the TRT regimen itself: a clinician may discuss adjusting the dose, the injection frequency, or switching between injectable and topical formulations to see whether a steadier hormone level reduces the skin changes you are noticing. Any of these changes should come from your clinician's evaluation of your levels and symptoms together, not from stopping or altering your dose on your own.
Skin changes versus other TRT side effects worth tracking
Acne and oily skin are not the only skin-adjacent change some people notice on TRT. Testosterone can also affect hair growth patterns, including speeding up pattern hair loss in people who are already genetically prone to it; our guide to testosterone therapy and hair loss covers that mechanism separately, since it involves a different pathway (DHT and hair follicles) than the sebaceous-gland changes behind acne.
It is worth keeping skin changes in the same ongoing conversation as other things your clinician monitors during TRT, such as hematocrit and periodic bloodwork, which our guide to how TRT is prescribed and monitored covers in more detail. None of these changes need to be tracked in isolation; a clinician looking at your full picture is better positioned to tell whether a pattern is expected or worth adjusting for.
When to call your clinician
Mention new or worsening acne, oiliness, or any skin irritation at your next follow-up, or sooner if it is affecting your quality of life or if you notice signs of infection, such as increasing redness, warmth, swelling, or pus around a breakout. If you are using a topical product and notice a skin reaction at the application site, or if a partner or child develops unexpected signs that could suggest testosterone exposure, contact your clinician promptly as well.
Do not stop or reduce your prescribed testosterone dose on your own because of a skin concern. Stopping suddenly can have its own effects separate from the skin issue, and your clinician needs accurate information about what you are and are not taking to make a safe recommendation.
The bottom line
Acne and oily skin are a recognized, well-documented side effect of testosterone replacement therapy, not a sign that something has gone wrong. The underlying mechanism, androgen-sensitive sebaceous glands responding to higher testosterone, is the same one behind acne at puberty. If skin changes bother you, dermatologic treatment or an adjustment to your TRT regimen are both reasonable things to discuss with your prescribing clinician. You can find more articles like this one in our Testosterone section.
Important Safety Information
Indication. Testosterone replacement therapy is FDA-approved to treat adult men with low testosterone caused by specific medical conditions that affect the testicles, pituitary gland, or brain and reduce the body's natural testosterone production; it is not FDA-approved simply for a decline in testosterone associated with aging alone, and it is not FDA-approved to treat acne or any skin condition on its own.
Common side effects. Acne or oily skin, injection-site or application-site reactions, fluid retention, changes in mood, and an increase in red blood cell count have been reported. Testosterone therapy can also suppress the body's own testosterone production and reduce fertility.
Warnings. Testosterone product labeling describes a possible increased risk of heart attack and stroke and states that testosterone therapy may worsen obstructive sleep apnea in some people. Testosterone should not be used in men with breast cancer or known or suspected prostate cancer, and it may worsen symptoms of benign prostatic hyperplasia and increase red blood cell counts requiring monitoring. Topical testosterone products carry warnings about the potential for secondary exposure to testosterone in children and women through skin contact.
Talk to your doctor. This information is educational and is not a substitute for medical advice. Only a licensed medical professional can determine whether a treatment is right for you. Talk to your doctor about the benefits and risks, and report any side effects.
Frequently asked questions
Does testosterone replacement therapy cause acne?
Acne and oily skin are listed as recognized side effects on testosterone product labeling and in the Endocrine Society's clinical practice guideline for testosterone therapy. Not everyone develops acne on TRT, but the skin changes that can occur are a known, well-documented effect of raising testosterone levels, not an unusual reaction.
Why does testosterone make skin oilier?
The sebaceous glands that produce skin oil are sensitive to androgens, including testosterone. When testosterone levels rise, those glands can produce more sebum, which increases oiliness and can contribute to clogged pores and acne, particularly on the face, chest, and back.
Is acne worse with testosterone injections than with gel?
Some people notice acne flares that track the higher peak hormone levels that can follow a testosterone injection, compared with the steadier levels typical of daily topical application. This varies by person, dose, and injection frequency, so it is worth discussing your specific pattern with your prescribing clinician rather than assuming one form is universally better for skin.
What can help with TRT-related acne?
Clinicians may suggest standard dermatologic approaches such as topical benzoyl peroxide or a retinoid, or may discuss adjusting the testosterone dose, injection frequency, or formulation. Do not stop or change a prescribed dose on your own; talk to your prescribing clinician about what is contributing to the acne before making any changes.
Is testosterone gel more likely to cause skin irritation?
Topical testosterone gel and solution products can cause irritation at the application site in some people. They also carry FDA boxed warnings about secondary exposure, since testosterone can transfer from treated skin to a partner or child through direct contact, so labeling describes covering the area and washing hands after application.
Will testosterone-related acne go away on its own?
Skin changes are often most noticeable in the first several months of therapy or after a dose increase, and may ease over time as the body adjusts or as a clinician fine-tunes the dose. There is no guarantee acne will resolve without any intervention, so ongoing changes are worth reporting to your clinician rather than waiting indefinitely.
