High testosterone produces different symptoms depending on whether you’re male or female, but some signs overlap: persistent acne, mood changes, and shifts in body composition. In men, normal testosterone falls between 193 and 824 ng/dL. In women, it’s below 40 ng/dL. When levels climb above those ranges, the body starts sending signals that something is off.
Symptoms in Men
Naturally elevated testosterone in men is uncommon. Most cases of genuinely high levels come from external testosterone use, whether prescribed therapy or anabolic steroids. The symptoms can be counterintuitive. You might expect that more testosterone means better sexual function and fertility, but the opposite happens: the body responds to excess testosterone by reducing its own production, which leads to low sperm counts, shrinking of the testicles, and erectile problems.
Other physical symptoms include acne (often severe and concentrated on the back and shoulders), fluid retention that causes swelling in the legs and feet, weight gain partly driven by increased appetite, headaches, and insomnia. Muscle mass increases, which might sound like a benefit, but it comes packaged with rising blood pressure, unfavorable cholesterol shifts, and a higher risk of blood clots. In adolescents, excess testosterone can prematurely close growth plates in the bones, permanently stunting height.
The psychological effects are harder to pin down but real. Mood swings, irritability, euphoria, impaired judgment, and in some cases delusions have all been documented. Aggressive behavior is commonly associated with high testosterone, though the evidence linking the two is less clear-cut than most people assume.
Symptoms in Women
Women are more sensitive to testosterone shifts because their baseline is so much lower. Even a modest increase can trigger noticeable changes. The most common early signs are oily skin, acne, and new hair growth in places like the chin, upper lip, chest, or abdomen, a pattern called hirsutism. At the same time, hair on the scalp may start thinning, particularly at the front on both sides of the head.
As levels stay elevated, the symptoms become more pronounced. Menstrual periods may become irregular or stop entirely. Breast size can decrease. Body shape shifts toward a more angular, less curved frame as muscle mass increases. With sustained high levels, the voice can deepen and the clitoris may enlarge. These later changes tend to develop gradually and are more typical of significantly elevated testosterone rather than borderline-high levels.
Skin and Acne Changes
Acne is one of the earliest and most visible signs of excess testosterone in both sexes. Testosterone stimulates the skin’s oil glands to produce more sebum, an oily substance that normally keeps skin moisturized. When there’s too much of it, pores clog, creating whiteheads and blackheads. The excess testosterone also triggers inflammation in the skin, which is why hormone-driven acne tends to be deeper and more painful than a typical breakout. It often shows up on the jawline, chin, back, and chest rather than just the forehead and nose.
Heart and Blood Vessel Effects
Sustained high testosterone levels, particularly from steroid use, carry serious cardiovascular risks. High doses of androgens tend to raise LDL (“bad”) cholesterol while lowering HDL (“good”) cholesterol, a combination that accelerates plaque buildup in arteries. Blood pressure rises. Animal studies show that chronic testosterone exposure enlarges the heart muscle, not in a healthy, athletic way, but in a way that weakens it over time. Athletes who abuse testosterone and similar compounds have a sharply increased risk of heart attack and stroke.
These cardiovascular effects build gradually and don’t always produce obvious symptoms until significant damage has occurred. Persistent headaches, shortness of breath during mild activity, or swelling in the lower legs can be early warning signs that something is wrong.
Sleep Disruption
High testosterone is linked to sleep apnea, a condition where breathing repeatedly stops and starts during sleep. Research on individuals receiving testosterone therapy found that their overall risk of sleep apnea was significantly higher than that of people not on testosterone. The connection likely involves changes to upper airway anatomy and the brain’s control of breathing patterns during sleep. If you’re experiencing loud snoring, waking up gasping, or feeling exhausted despite a full night’s rest, elevated testosterone could be a contributing factor.
The PCOS Connection in Women
Polycystic ovary syndrome is the most common reason women develop high testosterone without taking hormones externally. The cycle works like this: insulin resistance forces the body to produce extra insulin, and that excess insulin signals the ovaries to pump out more testosterone than normal. The testosterone then disrupts ovulation, which is why irregular or absent periods are a hallmark of the condition. Weight gain worsens the picture because excess body fat increases insulin production, which drives testosterone even higher.
Low levels of a protein called sex hormone-binding globulin compound the problem. This protein normally binds to testosterone in the blood and reduces its effect on tissues. Women with PCOS tend to have less of it, meaning even a moderately elevated testosterone level hits harder than the number on a lab report might suggest.
What Causes High Testosterone
In men, the overwhelming cause is external testosterone: injections, gels, patches, or anabolic steroids used for muscle building. Naturally occurring high testosterone from a tumor or glandular overproduction is rare but possible. In women, PCOS accounts for the majority of cases. Less common causes include tumors on the ovaries or adrenal glands that produce androgens, and certain medications.
The distinction matters because symptoms driven by external testosterone use in men will typically reverse once the source is removed, though fertility recovery can take months. In women with PCOS, treatment focuses on breaking the insulin-testosterone cycle, which often improves symptoms like acne, hair growth, and menstrual irregularity over time. Some changes from prolonged high testosterone, like voice deepening in women, may not fully reverse.