Decreased sex drive (libido) and other sexually related problems: Erectile dysfunction (ED) A decrease in the number and quality of erections. Decreased sperm counts and possible infertility

In adolescents or young adults who have completed puberty yet, having low testosterone may cause them to appear younger than their chronological age. These adolescents/young adults may also be void of body or facial hair. Men with lower levels may also experience hot flashes. Men may also experience a decrease in muscle mass leading to decreased strength and endurance, along with osteopenia (softening of the bones) and osteoporosis (decreased bone density). Men may also experience changes in blood lipids, such as cholesterol levels.

Men may also suffer from problems with memory, concentration, or a sudden lack of self-confidence.

Decreased sexual desire and function Muscle weakness Decreased vaginal lubrication Infertility

However, testosterone levels may drop significantly with age. Approximately 40% of men over the age of 45 have low testosterone. [9] X Research source Watch for symptoms or discuss with your doctor if your testosterone levels are decreasing normally or if you are at risk for low levels.

Injury to the testicles Alcoholism Medication side effects Testicular cancer or the treatments for testicular cancer High blood pressure or cholesterol Other hormonal disorders Infections, such as HIV/AIDS Chronic liver or kidney disease Type 2 diabetes Obstructive sleep apnea Chronic opiate medication use

Depending on your physical exam, your symptoms, and your history, other tests for thyroid function, diabetes, high blood pressure, and heart disease may be performed as well. Since testosterone levels can fluctuate, check 2–3 times in the morning to truly confirm if you have low testosterone levels.

In women, testosterone is also important for muscle and bone development, sex drive, and regulation of body organs. [17] X Research source Testosterone levels vary in different men, so it can be difficult to determine if the levels detected in one man are too low.