9 Signs of Low Testosterone in Men (and When to Get Tested)
October 6, 2026 · 5 min read · Clinically reviewed
The most common signs
Low sex drive. Weaker or fewer morning erections. Fatigue that sleep doesn't fix. Losing muscle or strength. Gaining belly fat. Low mood or irritability. Brain fog. Poor sleep. Hot flashes or reduced body hair in more advanced cases.
Other things that look like low T
Poor sleep or sleep apnea, depression, thyroid problems, high stress, heavy drinking, certain medications and weight gain itself can all cause similar symptoms. That's why symptoms alone aren't enough for a diagnosis.
How diagnosis works
Guidelines recommend two early-morning blood tests on different days showing low testosterone, plus symptoms. We also check related hormones (LH, FSH, prolactin, estradiol), PSA and a blood count to find the cause and make sure treatment is safe.
Get answers in 15 minutes
At Apex Method your first consult and point-of-care testosterone and PSA test are free, with results while you wait. If anything looks off, we order a full confirmatory panel.