Low Testosterone Symptoms in Men

Low testosterone can cause a range of physical, sexual and emotional symptoms. Many of these overlap with other common health issues, so they are a reason to talk to a doctor rather than a diagnosis on their own.

Sexual symptoms

Reduced interest in sex (low libido)
Difficulty getting or keeping an erection
Fewer spontaneous or morning erections

Physical symptoms

Ongoing tiredness or low energy that rest doesn't fix
Reduced muscle strength or muscle size
Increased body fat, especially around the waist
Hot flushes or sweats (less common)

Mood and thinking

Low mood, irritability or feeling "flat"
Poor concentration or memory
Reduced motivation
Disturbed sleep

Why symptoms are only the starting point

These symptoms are common and have many possible causes. Testosterone also naturally changes through the day and over a lifetime. A doctor will usually ask about your health history, examine you and arrange blood tests before drawing any conclusions. Read more about the bulk-billed testosterone blood test and how testosterone levels change with age.

Things worth noting before your appointment

Which symptoms you have and how long you've had them
Your sleep, alcohol intake, stress and exercise habits
Any medicines or supplements you take

Lifestyle factors can play a big part — see TRT vs natural options for a balanced overview.

Not sure where you stand?

Take the free 2-minute ADAM questionnaire to check whether your symptoms are worth discussing with a doctor and whether you may be eligible for a bulk billed* blood test.

Frequently asked questions

What are the most common symptoms of low testosterone?

Commonly reported symptoms include reduced sex drive, erection problems, ongoing tiredness, low mood or irritability, reduced muscle strength and increased body fat. These symptoms can also have many other causes, so a doctor needs to assess them.

Can symptoms alone diagnose low testosterone?

No. Symptoms only suggest that testing may be worthwhile. A diagnosis needs blood tests, usually taken in the morning and repeated, plus a doctor's assessment of your overall health.

What else can cause these symptoms?

Poor sleep, stress, depression, weight gain, heavy alcohol use, some medicines, thyroid problems and other medical conditions can all cause similar symptoms. That is why a doctor looks at the whole picture.

When should I see a doctor?

If several symptoms have lasted for weeks or months and are affecting your daily life, it is reasonable to book a GP appointment and ask whether a blood test is appropriate.

Low testosterone symptoms in men