Can Low Testosterone Cause Headaches?

Medically reviewed by: Katelyn Schwartz, NP, Family Nurse Practitioner with Advanced Training in TRT, BHRT, and Menopause Care

Last reviewed: October 2026

Frequent headaches can make you wonder whether your hormones are involved. Can low testosterone cause headaches? Men ask this often, and the answer is not as simple as you might expect. Low T rarely triggers headaches on its own. Still, it can create the conditions where headaches become more likely, through poor sleep, stress, and changes in how the brain handles pain.

There is also a second side to the question, because a new headache can be a side effect of testosterone therapy. Below you will find both answers, plus the warning signs that need a quick check-up.

Does Testosterone Cause Headaches? The Short Answer

Low testosterone is not a known direct cause of headaches, but it can raise the odds through poor sleep, stress and a lower pain threshold. Testosterone therapy can occasionally cause headaches too. A new, severe headache on treatment needs a blood test, because a high red blood cell count can be the cause.

In practice, testosterone and headaches tend to meet in four ways:

Indirectly, through low T symptoms. Broken sleep, fatigue and stress are classic headache triggers, and they often travel with low testosterone.
Through a shared cause. A pituitary tumour can lower testosterone and cause headaches at the same time. Sleep apnea, often alongside excess weight, can be linked to both.
As a treatment side effect. Headache is a listed, though uncommon, side effect in the Canadian product information.
Through thicker blood. Testosterone can raise hematocrit, and very high levels may bring headaches, blurred vision and fatigue.

What Low Testosterone Is and How It Affects the Body

Low testosterone (low T) means your levels sit below the normal range for your lab, alongside symptoms. Canadian labs report results in nmol/L, and guidelines call for two morning blood tests, not one. Its effects reach well beyond sexual health.

Testosterone helps regulate energy, mood, muscle and focus. It also acts on the brain, where it may influence how you handle stress and pain. You can read more in testosterone and mental health.

Sleep is another critical piece. The nightly rise in testosterone depends on sleep itself, and it needs at least three hours of sleep with a normal structure. So poor rest can pull levels down further. At the same time, low T often comes with worse sleep, which creates a loop that is hard to break. And chronic sleep loss is a well-known trigger of recurring head pain.

Can Low Testosterone Cause Headaches in Men?

So, can low testosterone cause headaches directly? Probably not, although the indirect connections are real.

Blood Vessels, Serotonin, and Pain Signals

Hormones help set how tight or relaxed blood vessels are, including in the brain. Testosterone may influence nitric oxide, a molecule that helps vessels relax. Researchers think this may matter in some headaches. Most of this work, however, comes from studies of estrogen and migraine in women.

Serotonin is another possible link. This brain chemical sits at the centre of migraine, and testosterone may affect how it works. Still, nobody has shown that low T lowers your headache threshold through this route. For now, it remains a plausible theory rather than a proven cause.

What Studies of Men With Migraine Found

The human data are small and mixed. A 2019 pilot study in Neurology International measured testosterone in 14 men with chronic migraine. Their average was below typical levels for men their age, and six of the 14 sat below the lab’s normal range. Yet a larger 2025 study in Frontiers in Neurology compared 60 men with episodic migraine with 60 matched men without it. It found no difference in testosterone at all.

A 2021 study in The Journal of Headache and Pain took a different angle. It surveyed more than 1,100 men. Those with migraine or cluster headache reported more symptoms that look like low T. But it did not measure hormones. So the authors could not say whether low T or the strain of chronic pain explained it.

The Indirect Route: Sleep, Stress, and Tension

Then there is the combined weight of the other symptoms of low testosterone. Chronic fatigue, broken sleep, high stress, and muscle tension often appear together. Each is a recognized headache trigger on its own. Stacked together, they make headaches more likely, even if testosterone never acts on pain directly.

Sleep deserves special attention, so see whether low testosterone can cause insomnia. Stress matters too, as covered in the relationship between stress and testosterone.

When Headaches and Low Testosterone Share One Cause

Sometimes the headache and the low T are not cause and effect at all. Instead, a single underlying problem drives both. These are the cases worth catching early.

A Pituitary Problem

The pituitary gland, at the base of the brain, sends the signal that tells the testes to make testosterone. A growth there can block that signal and, as it enlarges, press on nearby tissue and cause headaches. These tumours are rare, but they show the link clearly. In a 2022 study of 79 men with large prolactin-secreting pituitary tumours, 73.7% had headaches when diagnosed, and 79.7% had low testosterone. Encouragingly, 65% of the men got normal hormone signals back once the tumour was treated with medication.

That is why the Endocrine Society recommends a pituitary MRI for some men whose low T starts in the brain. These include very low testosterone, under about 5.2 nmol/L, high prolactin, or signs of a growth such as headaches or vision changes. A careful workup checks for this before anyone talks about testosterone therapy.

Sleep Apnea

Obstructive sleep apnea, where breathing stops and starts during sleep, is common in men with low T and excess weight. In a study of 1,131 people referred for sleep testing, 29% reported morning headaches. Loud snoring, choking at night and waking with a headache together are worth raising with your provider. Sleep apnea also affects whether TRT is safe, as covered in testosterone therapy and sleep apnea.

Other Causes of Headaches That May Overlap with Low Testosterone

Chronic stress ranks among the top triggers. Long-term stress raises cortisol, which may suppress testosterone over time. The resulting muscle tension often leads to tension-type headaches. Poor sleep then adds to this by lowering pain tolerance.

Dehydration is easy to overlook, especially for men who train hard. Alcohol also disrupts both hormones and sleep, so it is a double contributor. A slow thyroid can also bring fatigue, low mood, and headaches, so blood work usually checks it too.

When to Get Checked Quickly

Book an assessment if your headaches are becoming more frequent or intense, or if they arrive with changes in energy, mood, or sex drive. Go to the ER right away for a sudden, severe headache. The same goes for a headache with weakness, numbness, confusion, vision loss, or a stiff neck. Those signs need urgent care, whatever your hormone levels are.

Symptoms of Low Testosterone to Watch For

Low T rarely shows up as one obvious symptom. Instead, it arrives as a cluster of slow changes that are easy to dismiss one by one.

Persistent fatigue that lingers even after a full night of sleep is one of the most common complaints.
Lower libido and changes in sexual function tend to appear alongside fatigue.
Mood changes include irritability, low motivation, or a flat emotional state.
Body changes include loss of muscle, more fat around the midsection, and lower bone density.
Cognitive symptoms like poor concentration and mental fog round out the picture.
Aches in the body are part of the same cluster for some men. Read more on whether low testosterone can cause joint pain and whether low testosterone can cause shortness of breath.

Headaches are not a primary sign of low T, so they should never be used as a standalone clue. But alongside several of the symptoms above, they may be part of a larger pattern.

How to Check If Low Testosterone Is the Cause

The most reliable starting point is a blood test. Canadian guidance advises a morning test of total testosterone, between 7 and 11 a.m., when levels peak. The Endocrine Society adds that a low result should be confirmed with a second fasting morning test. Many providers also check free testosterone and sex hormone-binding globulin (SHBG).

A single result does not tell the whole story, though, because testosterone levels fluctuate naturally. A licensed provider reads your numbers alongside your symptoms and history. To know what to expect, see how to test testosterone levels accurately.

When headaches are part of the picture, the panel usually goes further. LH and FSH show whether the problem starts in the testes or the pituitary. Prolactin, thyroid and blood count tests help rule out look-alike conditions. At Beyoung Health, this blood work comes before your visit, so your Nurse Practitioner sees real numbers from the start.

Can TRT Cause Headaches?

Yes, occasionally. For most men, though, it is uncommon. In one 180-day trial of a testosterone gel, 0% to 4% of men had related headaches, depending on the dose. That figure comes from the gel’s Canadian product information. Post-marketing reports list headache as well.

High Hematocrit: The Headache to Take Seriously

Testosterone pushes the body to make more red blood cells. That is useful when levels are low, but too much can thicken the blood, a condition called erythrocytosis. A 2017 CMAJ case report notes that it can cause headache, fatigue, blurred vision and tingling. In the case it describes, a man on testosterone came in with a sudden headache.

That is why monitoring is built into treatment. Canadian guidance recommends checking hematocrit at baseline, at three and six months, and then once a year. If a new or worsening headache starts on TRT, contact your provider rather than waiting for the next scheduled test. You can read more in how to manage potential TRT side effects.

Other Reasons a Headache Can Start on Treatment

Testosterone can briefly worsen sleep apnea in some men, and that may bring morning headaches. It is also why untreated severe sleep apnea is a reason not to start until it is treated. If your headaches appear on waking, mention it, because your provider may suggest a sleep study.

When TRT Fits (and When It Doesn’t)

Testosterone replacement therapy is an established treatment for men with confirmed deficiency. It is not a headache treatment, and no published controlled trial in men has tested it as one. That distinction matters.

For men with proven low T, supervised therapy may help energy, mood, sleep, muscle and fat. In turn, some benefits of testosterone replacement therapy may ease headaches fed by poor sleep and fatigue. Individual results depend on baseline hormone levels, health status and lifestyle factors. Treatment also means ongoing monitoring of hormone levels, hematocrit and PSA.

There are also clear situations where the Endocrine Society advises against starting it. These include cancer of the breast or prostate, a high hematocrit and untreated severe sleep apnea. They also include uncontrolled heart failure, a heart attack or stroke in the past six months, and plans to father a child soon. Therapy can lower sperm production, so TRT and fertility is an important topic for younger men.

Testosterone from unregulated sources skips diagnosis and monitoring, so it carries extra risk. Learn more about the potential complications of testosterone therapy.

If your headaches come with fatigue, poor sleep or low drive, a full assessment is a sensible next step. Our licensed Nurse Practitioners offer TRT in Vancouver and TRT in Toronto, starting with lab work. When you are ready, you can book a consultation to review your results.

Can Low Testosterone Cause Headaches? FAQ

Q: Can low testosterone directly cause headaches?

There is no strong evidence for a direct link. Still, a pituitary problem can cause both at once, so headaches with very low testosterone deserve a closer look.

Q: Do headaches improve with testosterone therapy?

Headaches tied to poor sleep may ease if sleep and energy improve on TRT. No trial has tested this, and some men notice no change. TRT should never be prescribed only to treat headaches.

Q: Can TRT give you headaches?

It can, although it is uncommon. Headache is listed among reported side effects. A severe or persistent headache on treatment calls for a hematocrit check, since thick blood can cause it.

Q: Are migraines linked to low testosterone in men?

The evidence is mixed. A study of 14 men with chronic migraine found lower levels, but a matched study of 120 men found no difference.

Q: Should I get my testosterone tested if I have frequent headaches?

If headaches come alongside fatigue, mood shifts or low libido, a morning testosterone test is reasonable. Headaches alone are usually not enough to suspect low T.

Q: Can lifestyle changes help both headaches and testosterone?

Often, yes. Strength training, enough sleep, less alcohol and a healthy weight support testosterone. The same habits also cut common headache triggers.

This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before starting any treatment.