Where to Apply Testosterone Cream for Males?

Testosterone cream is typically applied to the upper arms, shoulders, or abdomen, though scrotal application is used in some clinical settings and produces significantly higher absorption at lower doses. The choice of site matters more than most men realize: where you put the cream changes how much testosterone actually reaches your bloodstream, how much converts to other hormones, and how likely you are to accidentally transfer it to someone else.

The Standard Sites and Why They Were Chosen

Most FDA-approved testosterone gels and creams list the upper arms and shoulders as the primary application areas. These sites were selected during clinical trials partly because they offer a large, relatively flat surface that is easy to cover with clothing afterward. When researchers compared the upper arms and shoulders to the abdomen using a 1.62% testosterone gel, they found that both sites brought testosterone levels into the normal range, but the abdomen delivered roughly 30 to 40 percent lower bioavailability than the upper arms and shoulders.¹ A separate study using a different 1% gel brand tested the arms, chest, and legs, and found the arms delivered the highest total testosterone levels, followed by the chest, with the legs trailing behind.²

The thighs, while sometimes used, tend to produce lower and more variable serum levels. One pharmacokinetic study of a 2% gel applied to the thighs found that a higher dose was needed to keep testosterone levels within the normal reference range, with all six participants achieving adequate average concentrations only at the highest dose tested.³ So if your prescription says “upper arms and shoulders,” there is a real pharmacokinetic reason behind that instruction, not just convention.

Why Skin Thickness Varies by Body Region

One reason different sites absorb testosterone at different rates comes down to the skin itself. The outermost layer of skin, which acts as the main barrier to absorption, is not the same thickness everywhere on the body. Measurements of men and women found that this barrier layer was thinnest at the shoulder, thicker at the buttocks, and thickest at the forearm.⁴ Thinner skin generally allows more drug to pass through. But skin thickness is only one factor. Blood flow to the area, the density of hair follicles (which create tiny channels through the barrier), local temperature, and even hydration all influence how much testosterone gets absorbed.⁵ The scrotal skin, which is unusually thin, highly vascularized, and rich in follicles, represents the extreme end of this spectrum.

Scrotal Application and Its Unique Profile

Applying testosterone cream to scrotal skin is not a fringe practice. It has been studied specifically because the scrotum absorbs testosterone far more efficiently than conventional sites, meaning you need a much lower dose to reach the same blood levels. In a pharmacokinetic trial, testosterone cream applied to scrotal skin produced a rapid rise in serum testosterone, peaking within about two to three hours, and a 25 mg dose maintained levels in the normal physiological range for 16 hours.⁶ For context, typical non-scrotal gel doses range from 50 to 100 mg per day, so the dose reduction with scrotal application is substantial. A separate study confirmed that scrotal application reached therapeutic levels (above 1,200 ng/dL) within two hours and maintained consistent concentrations beyond six hours.⁷

Scrotal application also tends to cause less skin irritation. An older comparison study found that allergic contact reactions occurred in about 12% of men using nonscrotal transdermal systems, while no confirmed allergic reactions were observed with the scrotal system. Moderately intense irritation immediately after removal was noted in 32% of nonscrotal system applications versus just 5% of scrotal ones.⁸ That said, these numbers came from patch systems, not creams, and cream formulations tend to be gentler on the skin than adhesive patches regardless of where they are placed.

The DHT Question With Scrotal Application

The scrotal skin contains high concentrations of the enzyme that converts testosterone into dihydrotestosterone (DHT), a more potent androgen. This is probably the most debated aspect of scrotal application. In the pharmacokinetic trial mentioned above, scrotal cream application raised serum DHT to a peak of about 1.2 ng/mL, peaking roughly two hours after the testosterone peak.⁶ Whether that elevation matters clinically is contested. Some clinicians prefer scrotal application precisely because they believe the higher DHT supports libido and other androgen-dependent functions. Others worry about potential effects on the prostate or hair loss. The honest state of the evidence is that long-term outcomes data comparing scrotal versus non-scrotal application are thin, so this remains an area where prescriber philosophy varies widely.

Preventing Transfer to Others

Secondary testosterone transfer is a genuine clinical concern, not just a label formality. There is a published case of prenatal virilization in a female infant caused by the mother’s unintentional exposure to the father’s testosterone gel, along with postnatal virilization of the infant’s twin sister.⁹ Children and pregnant women are especially vulnerable. The good news is that transfer can be dramatically reduced with simple precautions.

Clothing alone makes a large difference. In a controlled transfer study, wearing a T-shirt completely prevented testosterone transfer from the abdomen at a 2.5 g dose. At a higher 5.0 g dose applied to the abdomen, a T-shirt reduced transfer by roughly 40 to 48%. When the same higher dose was applied to the upper arms and shoulders (areas easily covered by a standard T-shirt), the barrier prevented transfer entirely.¹⁰ Washing the application site before skin-to-skin contact is also effective: one study found that when the site was washed before contact, average testosterone levels in the exposed person were comparable to their baseline.¹¹

This is one area where application site choice has a practical edge. If you apply to the upper arms and shoulders and then put on a shirt, you have a reliable physical barrier between the gel and anyone who touches you. Scrotal application offers a natural advantage here too, since that skin is covered by underwear and generally does not come into casual contact with others. Abdominal application is the trickiest for transfer prevention because shirts ride up, and belly-to-skin contact during hugging or holding a child is common.

Showering and Post-Application Timing

How long you need to wait before showering after applying testosterone cream is a question most men have, and the data is clearer than you might expect. Showering just 15 minutes after applying a testosterone gel resulted in plasma levels that were significantly and unacceptably low for most users. Waiting 30 minutes was not much better: average concentrations dropped substantially compared to the no-shower condition.¹²

A separate study examined the effect of skin washing at two, six, and ten hours after application. Washing at two or six hours caused a 10 to 14 percent decrease in overall absorption, but washing at ten hours had no meaningful effect on testosterone levels.¹³ That same study found that washing removed at least 81% of testosterone remaining on the skin surface, which is useful for reducing transfer risk even if it costs you a small amount of absorption. The practical takeaway: apply the cream and give it at least two hours before showering. If you can wait longer, you lose less, but the gains diminish past the six-hour mark. Morning application followed by an evening shower is close to ideal.

Skin Reactions and How to Manage Them

Acne is the most commonly reported skin side effect of testosterone replacement therapy, with incidence ranging from under 1% to about 9% depending on the formulation and the population studied.¹⁴ Rashes, itching, abnormal hair growth, and oily skin are also reported, though less frequently. Most mild acne can be handled with standard topical treatments like benzoyl peroxide or retinoids. Itching or local irritation, especially with gel formulations, can often be relieved with moisturizers or by rotating between application sites so the same patch of skin is not repeatedly exposed.

Rotating sites is worth doing even if you are not experiencing irritation. Applying to the exact same spot day after day can lead to local skin changes over time, and spreading the application across different approved sites helps keep the skin healthy. If you are applying to the upper arms, you can alternate between left and right, or shift between the outer arm and the shoulder on different days. The same principle applies to abdominal application: vary the exact area rather than always targeting the same spot.

A Lab Test Pitfall Most Men Do Not Know About

If you use testosterone gel or cream on your arms and then have blood drawn from the same arm for a testosterone level check, you may get a falsely high reading. A study exploring this found that when testosterone gel had been applied near the venipuncture site, mean serum testosterone was more than double the concentration measured from the unexposed arm. Importantly, this contamination effect disappeared when the gel was applied far enough away from the draw site.¹⁵ The researchers found that this kind of contamination is surprisingly common among gel users and can be identified by looking at the ratio of testosterone to a related hormone in the sample.

The fix is simple: on the day you have bloodwork, either apply the cream to a site that is nowhere near where blood will be drawn, or skip the application until after your draw. If you typically apply to your arms, tell the phlebotomist and have blood drawn from the opposite arm, or better yet, apply to a different site that morning. A falsely elevated result could lead your doctor to reduce your dose unnecessarily, so this is worth being proactive about.

Cream Versus Gel Formulations

Testosterone “cream” and testosterone “gel” are often used interchangeably in conversation, but they are different formulations. Commercial gels like AndroGel and Testim are hydroalcoholic, meaning they contain a significant amount of alcohol that helps the drug penetrate the skin and then evaporates quickly. About 9 to 14 percent of the testosterone applied via a 1% gel to the upper arms, shoulders, and abdomen is ultimately bioavailable.¹⁶ The alcohol base is what makes the gel dry within a few minutes, which is convenient but can also sting or irritate sensitive skin.

Compounded testosterone creams typically use a lipid-based vehicle without alcohol, which tends to feel more emollient and causes less stinging. Newer experimental formulations are exploring alcohol-free gels that use lipid nanoparticles to achieve similar skin penetration as the alcohol-based gels. Lab testing on human skin has shown that some of these newer carriers can match the testosterone accumulation in the outermost skin layer achieved by conventional alcohol-based gels and standard compounded creams.¹⁷ For now, the choice between cream and gel often comes down to comfort, cost, and whether you are using a commercially manufactured product or a compounded one. The site-selection principles are the same for both.

Practical Application Tips

Beyond choosing the right site, a few details matter for getting consistent absorption. Apply to clean, dry skin that is free of cuts, rashes, or sunburn. Damaged skin absorbs drugs unpredictably and can also become further irritated. Spread the cream in a thin, even layer rather than leaving a thick glob in one spot. A larger surface area generally improves absorption, so covering a broad swath of your upper arm is better than piling cream onto a small patch.

Do not apply to skin that will soon be under pressure or friction, like the area where a backpack strap sits or where a tight waistband presses. Friction can rub the cream off before it absorbs and may increase irritation. Avoid applying to areas where you plan to use sunscreen or other topical products, as these can create a barrier layer or interact with the cream’s vehicle in ways that alter absorption. If you need sunscreen on your arms, apply the testosterone cream first, wait for it to dry completely, and then apply sunscreen over it, though applying to a different site entirely is simpler.

Finally, wash your hands thoroughly with soap and water immediately after application. Your palms absorb testosterone too, and more importantly, anything left on your hands will transfer to surfaces, pets, and people you touch. Hand-washing is the single most effective step you can take to prevent secondary exposure, and it costs nothing in terms of your own absorption since your palms are not a useful application site anyway.

When Scrotal Application Makes Sense and When It Does Not

Scrotal application is gaining traction among some men’s health clinicians, but it is not universally recommended, and most commercial testosterone products are not labeled for this use. Compounded testosterone creams at lower concentrations (often around 10 to 20% of the standard non-scrotal dose) are typically what gets prescribed when a clinician chooses this route. The appeal is clear: better absorption at a lower dose, less risk of skin-to-skin transfer, and the site is naturally covered by clothing at all times.

The reasons a clinician might steer away from scrotal application include the DHT elevation discussed earlier, the fact that most commercial products have not been studied for scrotal use and therefore come without specific dosing guidance for that route, and patient preference. Some men simply find scrotal application inconvenient or uncomfortable, especially if they need to wait for the cream to dry before getting dressed. Others find it more practical than smearing gel across their shoulders every morning. There is no single “best” application site that works for everyone. The best site is the one that consistently gets you into the right testosterone range, minimizes side effects, fits into your routine, and keeps the people around you safe from secondary exposure.