Low Testosterone in Men: Symptoms, Causes and Treatment

Low testosterone (doctors call it hypogonadism or testosterone deficiency) is common, under-discussed and often fixable. It is also over-diagnosed online, where every tired 35-year-old is told he needs hormones. The truth sits in the middle. Some Filipino men really do have low levels and feel much better once the cause is found and treated. Many others feel low for reasons that have nothing to do with testosterone, or have levels that are low only because of sleep, weight or a recent illness.

This guide covers the symptoms that actually matter, the causes that are most common in the Philippines, when testing makes sense, how a doctor reaches a diagnosis and what the treatment paths look like, starting with the ones that cost the least.

What testosterone does in a man's body

Testosterone is made mainly in the testes, under instructions from the pituitary gland at the base of the brain. The pituitary releases luteinising hormone (LH), which tells the testes to make testosterone, and follicle-stimulating hormone (FSH), which drives sperm production. When testosterone is high enough, the brain eases off. When it falls, the brain should push harder.

That feedback loop matters because it tells doctors where a problem starts:

• Primary hypogonadism: the testes cannot respond. Testosterone is low and LH is high.
• Secondary hypogonadism: the pituitary or the brain is not sending the signal. Testosterone is low and LH is low or "normal" when it should be high. Obesity, opioids, poor sleep and pituitary problems usually work this way, which is why many cases are reversible.

Testosterone supports sex drive and erections, muscle and bone, red blood cell production, fat distribution, mood and energy. When it is truly low, any of these can suffer.

Symptoms of low testosterone

No single symptom proves low testosterone. The large European Male Ageing Study (EMAS) followed more than 3,000 men aged 40 to 79 and found that only three symptoms were consistently linked to low levels: low sex drive, fewer morning erections and erectile problems. Everything else on the usual lists is real, but it is shared with stress, depression, poor sleep and a dozen other conditions.

Sexual symptoms

These are the most specific signs:

• Lower interest in sex than is normal for you
• Fewer or absent morning erections
• Erections that are weaker or harder to keep
• Smaller volume of semen

Erectile problems on their own are more often about blood vessels (diabetes, high blood pressure, smoking) than hormones. Low desire plus weaker erections together is a stronger signal.

Energy and physical symptoms

• Tiredness that sleep does not fix
• Lower stamina at the gym or at work
• Loss of muscle size or strength despite training
• Less body and facial hair over time
• Hot flushes or sweats (uncommon, and a sign of very low levels)

Mood and thinking

• Low mood, irritability or a flat feeling
• Poor concentration and motivation
• Feeling "not yourself"

These overlap almost completely with depression, burnout and sleep debt. Anyone dealing with a two-hour commute each way on EDSA, a night shift and a young family will feel some of them regardless of hormones.

Body composition

• Gaining fat around the belly while arms and legs stay thin
• Breast tissue growth (gynaecomastia), sometimes tender
• Lower bone density, found on a scan or after a fracture from a minor fall
• Mild anaemia on a routine blood count

Belly fat is both a symptom and a cause. Fat tissue converts testosterone into estradiol and sends signals that dampen the pituitary, so weight gain and low testosterone tend to feed each other.

If you want a structured way to think about your own symptoms before seeing a doctor, use our short check. It does not diagnose anything, but it tells you whether testing is worth it.

Free toolLow T symptom checkTen questions, two minutes. Tells you whether a blood test is worth booking.→

What causes low testosterone

Most cases in men aged 28 to 55 have a cause that can be found and often reversed. Here are the common ones, roughly in the order a Philippine doctor will think about them.

Excess weight and belly fat

Obesity is the single most common driver of low testosterone in working-age men. Across studies, the more weight a man carries around the middle, the lower his total testosterone. Part of that is a real hormone problem, and part of it is that excess weight lowers SHBG, the protein that carries testosterone in the blood, which drags total testosterone down even when free testosterone is closer to normal.

The good news is that it runs in reverse. A 2013 meta-analysis in the European Journal of Endocrinology found that weight loss raised testosterone, and the more weight lost, the bigger the rise. For many men, a steady loss of 5 to 10 percent of body weight is the most effective hormone treatment available. Cutting back on large servings of white rice, sweetened drinks and late-night fast food, the habits that quietly add kilos in a desk job, counts as medical care here.

Poor sleep, sleep apnoea and BPO night shifts

Testosterone rises during sleep and peaks in the early morning. Short or broken sleep reduces it. In a well-known JAMA study, young healthy men who slept five hours a night for one week had daytime testosterone 10 to 15 percent lower than when they were well rested.

That matters for the hundreds of thousands of Filipinos working in BPO and other night-shift jobs. Daytime sleep in a hot, bright, noisy house, broken up by family life and errands, is often shorter and lighter than night sleep. Switching between day and night schedules on rest days makes it worse.

Obstructive sleep apnoea is the other big sleep cause. Loud snoring, gasping at night, waking unrefreshed and dozing off in traffic are the clues. Apnoea is common in heavier men, lowers testosterone and raises blood pressure. It is also one reason doctors are careful with TRT, since testosterone can make untreated apnoea worse.

Type 2 diabetes and prediabetes

Low testosterone is common in men with type 2 diabetes, with some studies finding low levels in around a third of them. The link runs both ways: insulin resistance lowers testosterone, and low testosterone makes it easier to gain fat and harder to control sugar. Diabetes is widespread in the Philippines and often found late, so a man tested for low T may find out about his blood sugar at the same time. That is a good outcome, not a bad one.

Opioids and other medicines

Long-term opioid pain medicines (tramadol, codeine, morphine and others) are a well-documented cause of low testosterone because they suppress the pituitary signal. Other medicines that can lower testosterone or affect the test include:

• Long courses of oral steroids such as prednisone
• Some antifungals, anti-androgens and older prostate medicines
• Anabolic steroids or testosterone taken without supervision, which shut down the body's own production, sometimes for months after stopping
• Some psychiatric and anti-seizure medicines that raise prolactin

Never stop a prescribed medicine on your own. Bring the full list, including anything bought over the counter or online, to your doctor.

Pituitary problems

Less common but important. A benign pituitary tumour that makes prolactin (a prolactinoma) is the classic example: it lowers testosterone and can cause headaches, vision changes or milky nipple discharge. Head injury, iron overload (haemochromatosis) and some inflammatory conditions can also affect the pituitary. A raised prolactin result or very low testosterone with low LH usually prompts further tests, sometimes an MRI.

Testicular causes

Mumps affecting the testes, injury, surgery, chemotherapy or radiotherapy, undescended testes in childhood and genetic conditions such as Klinefelter syndrome cause primary hypogonadism. These are rarely reversible, and TRT is often the right long-term answer.

Acute illness and heavy drinking

Dengue, COVID-19, a hospital stay, a period of severe stress or heavy drinking can all push testosterone down for weeks. Guidelines advise against testing during or soon after an acute illness, because the result does not reflect your usual level.

Ageing

Testosterone falls slowly with age, roughly 1 percent a year from about 40, and free testosterone falls a little faster as SHBG rises. But age alone explains much less than people think. In EMAS, true late-onset hypogonadism (symptoms plus low levels) affected about 2 percent of men aged 40 to 79, and it was much more closely tied to obesity and poor health than to birthdays. We cover this in detail in our guide to andropause.

When to get tested

Testing makes sense if you have:

• Low sex drive, fewer morning erections or erectile problems, especially together
• A known cause such as long-term opioid use, a pituitary condition, previous testicular injury or chemotherapy
• Type 2 diabetes with sexual symptoms
• Unexplained anaemia, low bone density or a fracture from a minor fall
• Breast tissue growth
• Infertility, where low testosterone may be part of the picture

Testing is less useful if your only symptom is tiredness, especially while you are sleeping five hours a day or recovering from an illness. Fix the obvious first or test at the same time, but expect the doctor to ask about sleep, alcohol and weight.

Screening every man for testosterone is not recommended by the Endocrine Society or the American Urological Association. Testing is for men with symptoms or a clear risk factor.

How diagnosis works

A proper diagnosis has two parts: symptoms that fit, and lab results that confirm. One blood test is never enough.

The blood tests

1. Total testosterone, early morning, fasting. Levels are highest in the morning and drop through the day, and eating (especially a sugary meal) can lower the reading. Most guidelines ask for a sample before about 10 am after an overnight fast.
2. A second morning test on a different day. Testosterone varies from day to day. Guideline-based diagnosis needs two separate early-morning results below the lab's reference range.
3. Free testosterone or SHBG, when total testosterone is borderline or SHBG is likely to be abnormal (obesity, diabetes, older age, liver or thyroid conditions).
4. LH and FSH to find out whether the problem starts in the testes or the pituitary.
5. Prolactin, and sometimes iron studies or other pituitary hormones, if LH is low.
6. Baseline safety tests before any treatment: a complete blood count (for haematocrit), PSA for older men, and often lipids and blood sugar.

Night-shift workers have a timing problem: "morning" for your body may be 6 pm. Our testosterone test guide explains how to handle that, along with what each test tells the doctor and where to have it done locally.

What counts as low

The harmonized reference range from Travison and colleagues, used by the Endocrine Society, puts the lower limit for total testosterone at 264 ng/dL (about 9.2 nmol/L) in healthy, non-obese young men. The AUA uses 300 ng/dL (about 10.4 nmol/L) as a practical cut-off. Philippine labs report in either unit and use their own ranges, so always compare your result with the range printed on your own report. See normal testosterone levels for the numbers by age and a Filipino reference study.

What the tests cost

A single total testosterone test at Medicard costs ₱2,340 walk-in or ₱1,800 for card members, and other labs quote less. A full first panel costs more. Our testosterone test price comparison lists every lab we have verified. Many HMO cards (Maxicare, Intellicare, Medicard and others) cover these tests when a doctor writes the request, so ask your HMO before paying out of pocket.

Treatment paths

Treatment depends on the cause, the severity and what you want, including whether you plan to have children. The usual order is below.

1. Lifestyle first, and it is real treatment

For the large group of men whose low testosterone comes from weight, sleep and blood sugar, lifestyle change is not a consolation prize. It is the treatment with the best evidence for reversing the problem rather than masking it.

• Weight: aim for steady loss through smaller rice portions, fewer sweet drinks and less late-night eating. Even 5 percent of body weight can move the number.
• Sleep: protect seven hours. For night-shift workers, that means blackout curtains, an electric fan or aircon for noise and heat, the phone on silent and a consistent sleep pattern even on rest days.
• Strength training: two or three sessions a week helps body composition and insulin sensitivity.
• Alcohol: heavy drinking sessions lower testosterone. Cutting back helps.
• Vitamin D: if a blood test shows deficiency, correcting it is sensible, though the effect on testosterone in men who are not deficient is small.

Our guide to increasing testosterone ranks these by evidence. Supplements sold as "boosters" have weak evidence at best, and we review them honestly in testosterone boosters.

2. Treat the cause

• Treating sleep apnoea, often with CPAP
• Controlling diabetes
• Reviewing or tapering opioids and other medicines with your doctor
• Treating a prolactinoma, usually with tablets rather than surgery
• Stopping unsupervised anabolic steroids, with medical support, so the body's own production can recover

Doctors usually recheck testosterone a few months after the cause is addressed. Many men no longer need anything else.

3. TRT, when it is indicated

Testosterone replacement therapy (TRT) is the right treatment for men with confirmed hypogonadism: consistent symptoms, two low morning tests and a cause that cannot be reversed or has not responded. It is a prescription medicine in the Philippines, started and monitored by a doctor.

Forms used locally include testosterone enanthate injections, testosterone undecanoate (Nebido) injections given at clinic visits months apart, and testosterone gel (AndroGel) applied daily. They differ in how steady the levels are, how often you see the clinic and what they cost. Our types of testosterone page compares them, and TRT cost breaks down the peso totals.

What TRT can do, based on the T Trials in older men with low levels: modest improvements in sex drive and sexual function, mood and bone density, and correction of mild anaemia. It did not meaningfully improve energy or walking distance. Younger men with clearly low levels often notice more. What it cannot do is replace weight loss and sleep for men whose low levels came from those.

What doctors monitor on TRT:

• Haematocrit, because testosterone raises red blood cells and very high levels thicken the blood
• PSA and prostate symptoms in men old enough for prostate checks
• Testosterone levels, to keep them in the normal range rather than above it
• Blood pressure, sleep apnoea symptoms, acne and breast changes

The TRAVERSE trial (2023), in men aged 45 to 80 with low testosterone and high heart risk, found that TRT did not increase heart attacks or strokes compared with placebo, though atrial fibrillation, kidney injury and blood clots in the lungs were slightly more common. That reassurance applies to supervised treatment that keeps levels normal, not to high doses taken without a doctor. Read TRT side effects for the full picture.

A word on fertility

TRT lowers sperm production, sometimes to zero, because it switches off the brain's signal to the testes. If you want children soon, tell your doctor before starting. There are other approaches for men in that situation, and a specialist can talk you through them.

Your next step

If your symptoms fit, the sensible path is simple: book a consult, get two early-morning tests and let a doctor look at the whole picture, including weight, sleep, sugar and medicines. That costs far less than months of supplements and far less than starting hormones you might not need.

Low testosterone and the gym crowd

Some younger men come to this topic after using anabolic steroids or "test" bought online. Those products are often unregistered, sometimes counterfeit and always risky without supervision, and stopping them commonly leaves natural testosterone very low for months. If that is you, there is no shame in seeing a doctor about it: recovery is a medical problem with medical answers. Our TRT vs steroids page explains the difference between supervised replacement and gym use.

Frequently asked questions

Frequently asked questions

What are the first signs of low testosterone in men?+

The most specific early signs are sexual: lower sex drive, fewer morning erections and weaker erections. Tiredness, low mood and gaining belly fat are common too, but they have many other causes, so they point to testing rather than to a diagnosis.

At what age does testosterone start to drop?+

Levels drift down slowly from around age 40, roughly 1 percent a year on average. Most men stay within the normal range for life. Weight gain, poor sleep and illness lower testosterone far more than age alone.

Can low testosterone be reversed without TRT?+

Often, yes, when a reversible cause is behind it. Losing excess weight, fixing short or broken sleep, controlling blood sugar and reviewing medicines such as opioids can bring levels back up. A doctor still needs to check for pituitary or testicular problems.

How is low testosterone diagnosed in the Philippines?+

A doctor looks for symptoms plus two separate early-morning fasting blood tests showing total testosterone below the lab's reference range. Further tests such as LH, FSH and prolactin show whether the cause is in the testes or the pituitary.

Is low testosterone dangerous?+

Untreated true hypogonadism can lead to bone loss, anaemia, loss of muscle and lower quality of life. Low testosterone is also a marker for conditions that matter on their own, like type 2 diabetes, obesity and sleep apnoea, which is why the cause deserves a proper look.

Does working night shifts lower testosterone?+

It can. Testosterone is made mostly during sleep, so short, broken or daytime sleep can reduce it. A one-week study of five-hour nights lowered daytime testosterone by about 10 to 15 percent in young healthy men.

Which doctor should I see for low testosterone?+

An endocrinologist or a urologist is the usual specialist. A general practitioner or internist can order the first tests and refer you. Many Philippine HMO cards cover the consult and the labs when a doctor requests them.