Male Hypogonadism: A Patient’s Guide to Symptoms, Diagnosis, and Treatment

Overview

Male hypogonadism is a condition in which the body does not produce enough testosterone, the primary male sex hormone responsible for sexual development, reproductive function, muscle mass, bone density, and mood regulation. It occurs when the testes (primary hypogonadism) or the pituitary gland and hypothalamus (secondary hypogonadism) do not function properly. The condition can be congenital (present at birth) or acquired later in life, and it affects people of all ages, from infants to older adults.

Signs & Symptoms

Symptoms vary depending on when hypogonadism develops. In adults, common signs include reduced sex drive, erectile dysfunction, persistent fatigue, depression or irritability, loss of muscle mass, increased body fat (especially around the abdomen), hot flashes, reduced facial and body hair, infertility, and decreased bone density (osteoporosis). In adolescents, hypogonadism often causes delayed puberty, including lack of testicular growth, no deepening of the voice, no growth of facial or body hair, and short stature compared to peers.

Causes & Risk Factors

Hypogonadism is classified by its cause: Primary hypogonadism stems from testicular failure, with common causes including Klinefelter syndrome (a genetic condition), testicular injury or infection (such as mumps), cancer treatments (chemotherapy or radiation), undescended testicles, or surgical removal of the testes. Secondary hypogonadism occurs when the pituitary gland or hypothalamus is impaired, with causes including pituitary tumors, head trauma, inflammatory diseases (like sarcoidosis or hemochromatosis), certain medications (opioids, glucocorticoids, or androgen deprivation therapy), obesity, and normal aging. Risk factors for developing hypogonadism include a family history of hormonal disorders, previous testicular or pituitary surgery, HIV/AIDS, chronic kidney or liver disease, and untreated sleep apnea.

Diagnosis

Diagnosis begins with a full physical exam, where your provider will check testicular size, hair distribution, and prostate health, followed by blood tests to measure total and free testosterone levels. Testosterone levels are highest in the morning, so blood work is almost always scheduled before 10 a.m. A diagnosis of hypogonadism is typically confirmed if morning testosterone levels are below 300 ng/dL on two separate tests. Additional tests may include measurements of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) to distinguish between primary and secondary hypogonadism, prolactin levels to rule out pituitary tumors, a semen analysis if infertility is a concern, or a pituitary MRI if a structural brain abnormality is suspected.

Treatment & Management

Treatment for male hypogonadism depends on the underlying cause, your age, symptom severity, and whether you wish to preserve fertility. The most common treatment is testosterone replacement therapy (TRT), which comes in multiple forms: topical gels or creams, intramuscular injections, transdermal patches, subcutaneous pellets, and oral tablets. TRT restores normal testosterone levels, improving symptoms like low libido, fatigue, reduced muscle mass, and low mood. For men who want to maintain fertility, alternative medications like clomiphene citrate or human chorionic gonadotropin (hCG) may be used to stimulate the body’s natural testosterone production without reducing sperm count. If a secondary cause (like a pituitary tumor) is identified, treating that underlying condition may resolve hypogonadism without the need for long-term hormone therapy. TRT is not recommended for people with active or untreated prostate cancer, elevated prostate-specific antigen (PSA) levels, or severe untreated sleep apnea.

Living With It

Male hypogonadism is often a lifelong condition, but proper management can dramatically improve your quality of life. You will need regular follow-up appointments every 3 to 6 months after starting treatment, then annually once your dose is stable, to monitor testosterone levels, blood counts, and prostate health. Lifestyle changes that support treatment include regular strength training to maintain muscle mass, a balanced diet rich in zinc and vitamin D, maintaining a healthy weight, limiting alcohol intake, getting 7 to 9 hours of sleep per night, and managing stress. If you experience mood changes or body image concerns related to the condition, consider joining a support group or speaking with a mental health professional.