Low testosterone, or male hypogonadism, is a condition in which the testicles don’t produce enough testosterone.
Testosterone is a hormone that stimulates the development of male characteristics and is essential for sperm production. Levels of testosterone are naturally much higher in men than in women. In men, testosterone helps maintain and develop:
- Sex organs and genitalia
- Muscle mass
- Adequate levels of red blood cells
- Bone density
- Sense of well-being
- Sexual and reproductive function
Low testosterone can begin during fetal development, puberty, or adulthood. Signs and symptoms of low testosterone depend on when the condition develops.
If the body doesn’t produce enough testosterone during fetal development, the result may be impaired growth of the external sex organs. Depending on when it develops and how much testosterone is present, a child who is genetically male may be born with:
- Female genitals
- Genitals that are neither male nor female (ambiguous genitals)
- Underdeveloped male genitals
Male hypogonadism can delay puberty or cause incomplete or abnormal development. It can impede:
- Development of muscle mass
- Voice deepening
- Growth of body hair and facial hair
- Growth of the penis and testicles
It can also cause:
- Excessive growth of the arms and legs in relation to the trunk of the body
- Development of breast tissue
Hypogonadism can alter certain masculine physical characteristics and impair normal reproductive function in adult males. Early signs and symptoms might include:
- Decreased sex drive
- Decreased energy
- Depression
Over time, men with hypogonadism can develop:
- Erectile dysfunction
- Infertility
- A decrease in hair growth on the face and body
- A decrease in muscle mass
- The development of breast tissue
- Loss of bone mass
There are two possible causes of low testosterone levels:
- Primary hypogonadism
- Secondary hypogonadism
The causes of primary and secondary hypogonadism are also divided into either congenital (at birth) or acquired (developed later in childhood or adulthood).
Primary hypogonadism happens when something is wrong with the testicles that doesn’t allow them to make normal levels of testosterone.
Secondary hypogonadism is caused by conditions that affect how the hypothalamus and/or pituitary gland function.
If you have any signs or symptoms of low testosterone, a healthcare provider will perform a physical exam and ask questions about your medical history, medications you take or have taken, smoking history, and any symptoms you currently have. They may also order blood tests. To make a diagnosis, they will consider your specific signs, symptoms, and any blood test results.
Healthcare providers treat low testosterone with testosterone replacement therapy. There are several forms of testosterone replacement therapy, including:
- Testosterone skin gels
- Intramuscular testosterone injections
- Testosterone patches
- Testosterone pellets
- Buccal testosterone tablets
- Testosterone nasal gel
- Oral testosterone
Healthcare providers and medical researchers don’t know how to prevent low testosterone resulting from genetic conditions or damage to the testicles, hypothalamus, or pituitary gland. However, lifestyle habits may help keep testosterone levels normal. They include:
- Eating a healthy diet
- Exercising
- Managing your weight
- Avoiding excessive use of alcohol and drugs
If you’re experiencing symptoms of low testosterone, you can receive treatment from an endocrinologist at Flushing Hospital Medical Center’s Ambulatory Care Center. To schedule an appointment, please call (718) 670-5486.
All content of this newsletter is intended for general information purposes only and is not intended or implied to be a substitute for professional medical advice, diagnosis or treatment. Please consult a medical professional before adopting any of the suggestions on this page. You must never disregard professional medical advice or delay seeking medical treatment based upon any content of this newsletter. PROMPTLY CONSULT YOUR PHYSICIAN OR CALL 911 IF YOU BELIEVE YOU HAVE A MEDICAL EMERGENCY.

