Testosterone deficiency is a common cause of depression in men and can often go unrecognized. As a psychiatrist, what I see is the either the depressed man who doesn’t get enough improvement with antidepressants or the man who is not particularly sad, but instead angry, irritable or anxious, or negative.

Here are some of the other signs and symptoms of testosterone deficiency.
Signs and symptoms of testosterone deficiency
Behavioral
Decreased assertiveness/increased submissiveness
Decreased stress tolerance
Irritability
Depression or lowered mood
Anxiety

Dermatologic
Loss of body and pubic hair (scalp hair is preserved)
Diminished beard growth
Thinning and drying of skin (decreased sebum production)
Metabolic
Mild anemia
Diminished bone mineralization
Obesity or increased body fat (men)
Headaches
Reduced muscle volume and strength
Reduced general vigor and hardiness
Asthenia
Frailty (elderly)
Sexual
Decreased semen volume
Erectile dysfunction
Decreased sexuality (decreased libido, arousal, responsiveness)…