Low Testosterone Symptoms Checklist: 12 Signs Men Notice

Medically reviewed by Meg LaFerriere, APRN · Regulate Rx, Lee’s Summit, MO

Feeling flat, tired and uninterested in things you used to enjoy is easy to blame on stress or age. Sometimes it is. Sometimes it’s worth checking your testosterone.

What are the most common symptoms of low testosterone?

Testosterone affects your sex drive, energy, muscle, bone, red blood cells and mood. When levels drop below what your body needs, the changes tend to be gradual. Many men only notice them looking back.

Here is a checklist of signs the American Urological Association (AUA) and Endocrine Society describe in men with testosterone deficiency:

1. Lower sex drive (libido) than you’re used to
2. Fewer spontaneous or morning erections
3. Erectile changes, often alongside low desire
4. Ongoing fatigue that sleep doesn’t fix
5. Low mood, irritability or a “flat” feeling
6. Trouble focusing or feeling mentally foggy
7. Loss of muscle size or strength despite training
8. More fat around the waist
9. Less body or facial hair over time
10. Hot flashes or sweats (less common, but possible)
11. Breast tenderness or enlargement
12. Smaller or softer testes, or a history of low bone density

Checking several boxes doesn’t mean you have low T. It means the conversation is worth having.

Which symptoms point most strongly to low T?

Not every symptom carries the same weight. Research in middle-aged and older men has found that sexual symptoms, especially low libido, fewer morning erections and erectile dysfunction, line up most closely with low testosterone levels.

Fatigue, low mood and weight gain are real and important. They’re also very common in men with normal testosterone, because sleep, stress, depression, thyroid problems and many medications cause the same feelings.

Symptom type	Examples	How specific to low T?
Sexual	Low libido, fewer morning erections	Most specific
Physical	Muscle loss, belly fat, less body hair	Moderate
Mental and emotional	Fatigue, low mood, poor focus	Least specific; many causes

What else can cause these symptoms?

Before anyone points to testosterone, a good evaluation looks at the bigger picture. Common lookalikes include:

• Poor or short sleep, including untreated sleep apnea
• Depression or anxiety
• Thyroid problems or anemia
• Type 2 diabetes or prediabetes
• Heavy alcohol use
• Medications such as opioids or steroids

Some of these also lower testosterone. That’s why your practitioner reviews your history and labs together instead of treating a single number or a single symptom.

When should you get your testosterone tested?

Consider testing if you have several symptoms on the checklist, especially the sexual ones, and they’ve lasted for weeks to months. Testing is also reasonable if you have conditions linked to low T, such as type 2 diabetes, obesity, opioid use, a pituitary condition or unexplained low bone density.

The AUA recommends measuring total testosterone in the early morning, and repeating it on a second morning before making a diagnosis. Levels swing during the day and from day to day, so one test isn’t enough. You can read more about the process on our men’s hormone program page.

What should you do if you check several boxes?

Write down your symptoms, when they started and anything that makes them better or worse. Bring a list of your medications and supplements. That makes your first visit far more useful.

If you have chest pain, sudden vision changes, severe headaches, a new lump or breast discharge, don’t wait for a hormone visit. See your doctor promptly.

For men in Lee’s Summit and the greater Kansas City area, a consultation with Meg LaFerriere, APRN, is a simple first step. She’ll talk through your symptoms, order the right labs and explain what the results mean. Consultation and lab costs are listed on our pricing page.

Low T symptoms and Kansas City men

Plenty of men around Lee’s Summit write off low energy, poor sleep and low drive as just getting older. Sometimes that’s true, and sometimes testosterone is part of it. Testing is the only way to know, and our men’s hormone program starts with a consultation and baseline labs.

Frequently asked questions

At what age do low testosterone symptoms usually start?

Testosterone tends to decline slowly with age, often starting in your 30s or 40s, but most men never develop symptomatic deficiency. Low T can also happen in younger men because of medical conditions, medications or lifestyle factors.

Can low testosterone cause anxiety or depression?

Low testosterone is linked with low mood, irritability and low energy, but depression and anxiety have many causes. If mood symptoms are significant, it’s important to address them directly with a clinician, whatever your testosterone level.

Is a home testosterone test accurate enough?

Home kits can give a rough idea, but a diagnosis follows guideline standards: early-morning blood tests, repeated on two separate days, interpreted alongside your symptoms and history. Your practitioner may also check related labs such as LH, SHBG or hematocrit.

Sources: American Urological Association 2018 Testosterone Deficiency Guideline; Endocrine Society Clinical Practice Guideline on Testosterone Therapy in Men with Hypogonadism (2018); Mayo Clinic; Cleveland Clinic; NIH/MedlinePlus

This article is for general education and isn’t medical advice. Treatments aren’t right for everyone, and results vary. Our practitioner reviews your health history before any treatment.