How High Testosterone Shows Up in Men and How to Deal With It

Key Takeaways:

• High testosterone in men can show up in several noticeable ways, including acne, changes in hair growth, a high sex drive, and mood swings.

• Symptoms of high testosterone often stem from how the hormone and its derivative, DHT, affect oil production, hair follicles, red blood cell levels, and the brain.

• Elevated testosterone, especially from TRT, supplements, or anabolic steroids, can affect heart health, fertility, and overall well-being.

• A simple blood test is the only way to confirm high testosterone levels, and a healthcare provider can help you figure out the cause and next steps.
  

Having high testosterone levels as a man may not initially seem like such a bad thing, since the hormone is associated with many “manly” characteristics.

As the primary male sex hormone, or androgen, testosterone plays an important role throughout your life, from stimulating puberty to helping with muscle growth and maintenance.

But just like having low testosterone can affect you physically and mentally, high testosterone in men can have unwanted side effects. Keep reading to find out what’s considered a high testosterone level, common signs that your hormones may be out of balance, and how to find out for sure.

The reference range for normal testosterone levels can vary greatly depending on the source. But it usually falls between 270 and 1,070 nanograms per deciliter (ng/dL), which means high testosterone is somewhere above that threshold.

According to the American Urological Association (AUA), clinically low testosterone levels are considered below 300 ng/dL, with the result staying consistent across two separate morning blood tests.

Superhuman strength? Not likely. But some potential signs and symptoms of high testosterone include acne, changes in hair growth, a high sex drive, and more. We’ll explain why these changes happen and what testosterone has to do with each.

Acne

Both testosterone and its more potent derivative dihydrotestosterone (DHT) play key roles in driving sebum production, the natural, waxy oil your body makes to lubricate your skin and hair. 

When sebum production goes into overdrive, pores can get clogged, and breakouts become more likely. That’s why excess testosterone or heightened sensitivity to testosterone and DHT can contribute to acne — they push oil production into high gear.

Changes in Hair Growth

Testosterone and DHT can also contribute to changes in hair growth, but the effect depends on the body site and a person’s genetics.

Research shows that DHT (converted from testosterone) is central to male pattern hair loss, and that even normal androgen levels can lead to hair thinning and loss in genetically susceptible people. When testosterone levels are high, more DHT is produced, which can have an even greater effect on your hair if your genes make you vulnerable to this kind of hair loss.

At the same time, excess androgens can stimulate excessive hair growth in other parts of the body, like the beard, armpits, and pubic area.

High Sex Drive

High testosterone may mean higher activity in the bedroom, but there's nuance here. 

One study found that men with higher testosterone levels were more likely to report infidelity, which the authors interpreted as reflecting testosterone’s broader role in driving sexual desire and mating effort. 

They also pointed to prior research consistently linking elevated testosterone with stronger sex drive, more frequent sexual encounters, and better sexual function, noting that testosterone therapy can boost libido not only in men with low levels but even in those with testosterone in the normal range.

Blood Pressure Changes

Studies show that both high and low testosterone levels can affect heart health, including raising the risk of high blood pressure (hypertension). 

In one large study of men, those with lower testosterone were more likely than those with normal levels to have high blood pressure, especially if they were younger, leaner, smokers, or had a family history of high blood pressure. 

Interestingly, the same research found that very high testosterone levels, particularly in men with more severe hypertension, were linked to a higher risk of stroke, heart attack, and other cardiovascular issues. 

In short, when it comes to testosterone and heart health, trouble can show up at either end of the spectrum.

Mood Swings

Testosterone can have a big influence on how you feel and react to the world around you, especially when levels are out of balance.

Research shows that men with high testosterone tend to be more assertive and status-seeking, which can look like confidence or, in some cases, irritability. Higher levels can also make you respond more strongly when you’re challenged or stressed. It’s a stretch to say testosterone directly causes aggressive behavior, but it can make emotional responses feel a little more intense.

Testosterone can also affect how you handle anxiety and stress, sometimes boosting resilience, and other times making you more on edge, depending on your personality and genetics. 

So if you thought testosterone was all about sex drive and beard length, think again. This hormone can have a real impact on your mood and motivation, too.

Increased Red Blood Cell Count

Testosterone plays a role in red blood cell production, and when levels run high, hematocrit (the percentage of red blood cells in your blood) can climb too. Studies show this increase happens quickly and in a dose-dependent way (the higher your testosterone, the higher your hematocrit), which is why a high red blood cell count (erythrocytosis) is often considered a possible sign of elevated testosterone.

Men with erythrocytosis have a higher risk of blood clots and high blood pressure, which can affect heart health and circulation. And because erections rely on healthy blood flow, circulation issues may contribute to erectile dysfunction (ED), though more research is needed to understand this link.

Low Sperm Count

While low sperm count is typically associated with low testosterone, artificially raising testosterone levels can also lead to fertility problems. In fact, one of the most common side effects of testosterone replacement therapy (TRT) is a drop in sperm production. The more testosterone you take, and the higher your levels climb, the greater the risk of shutting down sperm production altogether.

Here’s why: In healthy adult men, the hypothalamic-pituitary-gonadal (HPG) axis tightly regulates testosterone and sperm production. The hypothalamus releases gonadotropin-releasing hormone (GnRH), which triggers the pituitary to release luteinizing hormone (LH) and follicle-stimulating hormone (FSH). LH tells the testes to make testosterone, and FSH helps drive sperm production. As testosterone rises, the brain uses a negative feedback loop to dial back GnRH, LH, and FSH.

When men take exogenous testosterone, that feedback loop switches into overdrive. The brain senses hormone levels are high and shuts down LH and FSH, which in turn shuts down the testes’ ability to make their own testosterone and their ability to make sperm.

Other Health Problems Related to High Testosterone

High testosterone can also contribute to a variety of other medical conditions, especially if levels are artificially high due to exogenous testosterone use, including:

• Sleep apnea

• Depression and sleep problems

• Lower levels of HDL, or good cholesterol

• Fluid retention, potentially leading to weight gain

• Increased risk of prostate cancer

Potential causes of high testosterone levels in men include:

• Using anabolic steroids for increased muscle mass or athletic performance

• Taking TRT or testosterone supplements

• Gonadal tumors (like tumors in the testicles)

• Disorders affecting the adrenal glands (like congenital adrenal hyperplasia)

• Adrenal tumors

• Tumors affecting the pituitary gland

Before you can treat high testosterone, you should work with a healthcare provider to figure out what’s causing it.

If a medical condition, such as a tumor, is driving your elevated testosterone, treatment usually focuses on addressing the root cause. In many cases, a doctor may recommend surgery to shrink or remove the tumor.

If your levels are high because of anabolic steroid use, you should check in with a doctor to safely stop those substances. They can monitor how your hormone levels change and help manage any withdrawal symptoms.

If you’re taking testosterone therapy or supplements, talk with your provider about whether adjusting or pausing your dose might bring your levels back into a healthier range.

In some cases, it’s less about lowering testosterone directly and more about managing the symptoms that come with high T. Simple steps like using acne-focused skin care or shaving excess hair can help keep those effects under control.

Lifestyle changes can also make a meaningful difference, especially if you’ve been on TRT because of low testosterone. Regular exercise, nutrient-dense meals, and reaching a healthy weight can support more balanced hormone levels and improve overall well-being.

High testosterone isn’t always easy to spot, and it won’t give you superhuman strength. But it can show up in ways that affect your skin, hair, libido, mood, and overall health, especially when levels get too high from testosterone therapy, supplements, or anabolic steroids. 

If you’re noticing changes that feel hormonal, the only way to know for sure is with a testosterone blood test. A healthcare provider can help you understand your levels, look for the underlying cause, and figure out whether treatment or a simple dose adjustment is the right move for you.

Can high testosterone be dangerous?

When testosterone levels are high from TRT, supplements, or steroid use, high testosterone can cause dangerous health issues. Increased red blood cell count, sleep apnea, high blood pressure, and increased cardiovascular risks have all been linked to high testosterone. That’s why monitoring is so essential if you’re using testosterone.

Can high testosterone cause hair loss?

Yes. Testosterone can convert to DHT, a more potent androgen that can shrink hair follicles if you’re genetically susceptible. High androgen activity can speed up male pattern baldness while stimulating more hair growth in places like the face, chest, and pubic area.

Can high testosterone lower fertility?

Yes, if it’s from external sources. TRT, testosterone boosters, and anabolic steroids can shut down the hormones needed for sperm production, leading to low sperm count or even infertility.

How do I know if I have high testosterone?

Symptoms can offer clues, like acne, mood changes, or a high sex drive, but bloodwork is the only way to know for sure. A simple morning testosterone test can show whether your levels are above the normal range.